Get quick answers to your questions about the article from our AI researcher chatbot
{'id': 'https://openalex.org/W2039946713', 'doi': 'https://doi.org/10.1073/pnas.75.3.1591', 'title': 'Neurons containing beta-endorphin in rat brain exist separately from those containing enkephalin: immunocytochemical studies.', 'display_name': 'Neurons containing beta-endorphin in rat brain exist separately from those containing enkephalin: immunocytochemical studies.', 'publication_year': 1978, 'publication_date': '1978-03-01', 'ids': {'openalex': 'https://openalex.org/W2039946713', 'doi': 'https://doi.org/10.1073/pnas.75.3.1591', 'mag': '2039946713', 'pmid': 'https://pubmed.ncbi.nlm.nih.gov/349568', 'pmcid': 'https://www.ncbi.nlm.nih.gov/pmc/articles/411520'}, 'language': 'en', 'primary_location': {'is_oa': False, 'landing_page_url': 'https://doi.org/10.1073/pnas.75.3.1591', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S125754415', 'display_name': 'Proceedings of the National Academy of Sciences', 'issn_l': '0027-8424', 'issn': ['0027-8424', '1091-6490'], 'is_oa': False, 'is_in_doaj': False, 'is_core': True, 'host_organization': 'https://openalex.org/P4310320052', 'host_organization_name': 'National Academy of Sciences', 'host_organization_lineage': ['https://openalex.org/P4310320052'], 'host_organization_lineage_names': ['National Academy of Sciences'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}, 'type': 'article', 'type_crossref': 'journal-article', 'indexed_in': ['crossref', 'pubmed'], 'open_access': {'is_oa': True, 'oa_status': 'green', 'oa_url': 'https://europepmc.org/articles/pmc411520?pdf=render', 'any_repository_has_fulltext': True}, 'authorships': [{'author_position': 'first', 'author': {'id': 'https://openalex.org/A5109322768', 'display_name': 'F E Bloom', 'orcid': None}, 'institutions': [], 'countries': [], 'is_corresponding': False, 'raw_author_name': 'F Bloom', 'raw_affiliation_strings': ['The Arthur Vining Davis Center for Behavioral Neurobiology, and'], 'affiliations': [{'raw_affiliation_string': 'The Arthur Vining Davis Center for Behavioral Neurobiology, and', 'institution_ids': []}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5109242966', 'display_name': 'E Battenberg', 'orcid': None}, 'institutions': [], 'countries': [], 'is_corresponding': False, 'raw_author_name': 'E Battenberg', 'raw_affiliation_strings': ['The Arthur Vining Davis Center for Behavioral Neurobiology, and'], 'affiliations': [{'raw_affiliation_string': 'The Arthur Vining Davis Center for Behavioral Neurobiology, and', 'institution_ids': []}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5057419092', 'display_name': 'Jean Rossier', 'orcid': 'https://orcid.org/0000-0003-1821-2135'}, 'institutions': [], 'countries': [], 'is_corresponding': False, 'raw_author_name': 'J Rossier', 'raw_affiliation_strings': ['The Arthur Vining Davis Center for Behavioral Neurobiology, and'], 'affiliations': [{'raw_affiliation_string': 'The Arthur Vining Davis Center for Behavioral Neurobiology, and', 'institution_ids': []}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5077195123', 'display_name': 'Nicholas Ling', 'orcid': 'https://orcid.org/0000-0002-0853-7035'}, 'institutions': [{'id': 'https://openalex.org/I1307098950', 'display_name': 'Salk Institute for Biological Studies', 'ror': 'https://ror.org/03xez1567', 'country_code': 'US', 'type': 'nonprofit', 'lineage': ['https://openalex.org/I1307098950']}], 'countries': ['US'], 'is_corresponding': False, 'raw_author_name': 'N Ling', 'raw_affiliation_strings': [' Neuroendocrinology Laboratory of The Salk Institute, La Jolla, California 92037'], 'affiliations': [{'raw_affiliation_string': ' Neuroendocrinology Laboratory of The Salk Institute, La Jolla, California 92037', 'institution_ids': ['https://openalex.org/I1307098950']}]}, {'author_position': 'last', 'author': {'id': 'https://openalex.org/A5061993952', 'display_name': 'Roger Guillemin', 'orcid': None}, 'institutions': [{'id': 'https://openalex.org/I1307098950', 'display_name': 'Salk Institute for Biological Studies', 'ror': 'https://ror.org/03xez1567', 'country_code': 'US', 'type': 'nonprofit', 'lineage': ['https://openalex.org/I1307098950']}], 'countries': ['US'], 'is_corresponding': False, 'raw_author_name': 'R Guillemin', 'raw_affiliation_strings': [' Neuroendocrinology Laboratory of The Salk Institute, La Jolla, California 92037'], 'affiliations': [{'raw_affiliation_string': ' Neuroendocrinology Laboratory of The Salk Institute, La Jolla, California 92037', 'institution_ids': ['https://openalex.org/I1307098950']}]}], 'institution_assertions': [], 'countries_distinct_count': 1, 'institutions_distinct_count': 1, 'corresponding_author_ids': [], 'corresponding_institution_ids': [], 'apc_list': None, 'apc_paid': None, 'fwci': 22.164, 'has_fulltext': True, 'fulltext_origin': 'pdf', 'cited_by_count': 656, 'citation_normalized_percentile': {'value': 0.999659, 'is_in_top_1_percent': True, 'is_in_top_10_percent': True}, 'cited_by_percentile_year': {'min': 99, 'max': 100}, 'biblio': {'volume': '75', 'issue': '3', 'first_page': '1591', 'last_page': '1595'}, 'is_retracted': False, 'is_paratext': False, 'primary_topic': {'id': 'https://openalex.org/T10814', 'display_name': 'Neuropeptides and Animal Physiology', 'score': 0.9998, 'subfield': {'id': 'https://openalex.org/subfields/2804', 'display_name': 'Cellular and Molecular Neuroscience'}, 'field': {'id': 'https://openalex.org/fields/28', 'display_name': 'Neuroscience'}, 'domain': {'id': 'https://openalex.org/domains/1', 'display_name': 'Life Sciences'}}, 'topics': [{'id': 'https://openalex.org/T10814', 'display_name': 'Neuropeptides and Animal Physiology', 'score': 0.9998, 'subfield': {'id': 'https://openalex.org/subfields/2804', 'display_name': 'Cellular and Molecular Neuroscience'}, 'field': {'id': 'https://openalex.org/fields/28', 'display_name': 'Neuroscience'}, 'domain': {'id': 'https://openalex.org/domains/1', 'display_name': 'Life Sciences'}}, {'id': 'https://openalex.org/T11178', 'display_name': 'Receptor Mechanisms and Signaling', 'score': 0.9954, 'subfield': {'id': 'https://openalex.org/subfields/1312', 'display_name': 'Molecular Biology'}, 'field': {'id': 'https://openalex.org/fields/13', 'display_name': 'Biochemistry, Genetics and Molecular Biology'}, 'domain': {'id': 'https://openalex.org/domains/1', 'display_name': 'Life Sciences'}}, {'id': 'https://openalex.org/T10911', 'display_name': 'Chemical Synthesis and Analysis', 'score': 0.9917, 'subfield': {'id': 'https://openalex.org/subfields/1312', 'display_name': 'Molecular Biology'}, 'field': {'id': 'https://openalex.org/fields/13', 'display_name': 'Biochemistry, Genetics and Molecular Biology'}, 'domain': {'id': 'https://openalex.org/domains/1', 'display_name': 'Life Sciences'}}], 'keywords': [{'id': 'https://openalex.org/keywords/diencephalon', 'display_name': 'Diencephalon', 'score': 0.7061863}, {'id': 'https://openalex.org/keywords/endorphins', 'display_name': 'Endorphins', 'score': 0.48995915}], 'concepts': [{'id': 'https://openalex.org/C2777803847', 'wikidata': 'https://www.wikidata.org/wiki/Q325101', 'display_name': 'Enkephalin', 'level': 4, 'score': 0.7464611}, {'id': 'https://openalex.org/C2775969318', 'wikidata': 'https://www.wikidata.org/wiki/Q192419', 'display_name': 'Diencephalon', 'level': 3, 'score': 0.7061863}, {'id': 'https://openalex.org/C118303440', 'wikidata': 'https://www.wikidata.org/wiki/Q419968', 'display_name': 'Neuropeptide', 'level': 3, 'score': 0.5667226}, {'id': 'https://openalex.org/C86803240', 'wikidata': 'https://www.wikidata.org/wiki/Q420', 'display_name': 'Biology', 'level': 0, 'score': 0.5251203}, {'id': 'https://openalex.org/C35866371', 'wikidata': 'https://www.wikidata.org/wiki/Q6005502', 'display_name': 'Immunocytochemistry', 'level': 2, 'score': 0.51784974}, {'id': 'https://openalex.org/C2777003273', 'wikidata': 'https://www.wikidata.org/wiki/Q164386', 'display_name': 'Hypothalamus', 'level': 2, 'score': 0.50486237}, {'id': 'https://openalex.org/C91523082', 'wikidata': 'https://www.wikidata.org/wiki/Q420496', 'display_name': 'Antiserum', 'level': 3, 'score': 0.5035052}, {'id': 'https://openalex.org/C126322002', 'wikidata': 'https://www.wikidata.org/wiki/Q11180', 'display_name': 'Internal medicine', 'level': 1, 'score': 0.49693397}, {'id': 'https://openalex.org/C2778680817', 'wikidata': 'https://www.wikidata.org/wiki/Q190528', 'display_name': 'Endorphins', 'level': 2, 'score': 0.48995915}, {'id': 'https://openalex.org/C134018914', 'wikidata': 'https://www.wikidata.org/wiki/Q162606', 'display_name': 'Endocrinology', 'level': 1, 'score': 0.48087433}, {'id': 'https://openalex.org/C204232928', 'wikidata': 'https://www.wikidata.org/wiki/Q899285', 'display_name': 'Immunohistochemistry', 'level': 2, 'score': 0.4318032}, {'id': 'https://openalex.org/C185592680', 'wikidata': 'https://www.wikidata.org/wiki/Q2329', 'display_name': 'Chemistry', 'level': 0, 'score': 0.32179043}, {'id': 'https://openalex.org/C159654299', 'wikidata': 'https://www.wikidata.org/wiki/Q79460', 'display_name': 'Antibody', 'level': 2, 'score': 0.24087629}, {'id': 'https://openalex.org/C170493617', 'wikidata': 'https://www.wikidata.org/wiki/Q208467', 'display_name': 'Receptor', 'level': 2, 'score': 0.16754135}, {'id': 'https://openalex.org/C55493867', 'wikidata': 'https://www.wikidata.org/wiki/Q7094', 'display_name': 'Biochemistry', 'level': 1, 'score': 0.15325776}, {'id': 'https://openalex.org/C203014093', 'wikidata': 'https://www.wikidata.org/wiki/Q101929', 'display_name': 'Immunology', 'level': 1, 'score': 0.12251398}, {'id': 'https://openalex.org/C71924100', 'wikidata': 'https://www.wikidata.org/wiki/Q11190', 'display_name': 'Medicine', 'level': 0, 'score': 0.10875255}, {'id': 'https://openalex.org/C2781063702', 'wikidata': 'https://www.wikidata.org/wiki/Q427523', 'display_name': 'Opioid', 'level': 3, 'score': 0.0}], 'mesh': [{'descriptor_ui': 'D004723', 'descriptor_name': 'Endorphins', 'qualifier_ui': 'Q000378', 'qualifier_name': 'metabolism', 'is_major_topic': True}, {'descriptor_ui': 'D004745', 'descriptor_name': 'Enkephalins', 'qualifier_ui': 'Q000378', 'qualifier_name': 'metabolism', 'is_major_topic': True}, {'descriptor_ui': 'D007031', 'descriptor_name': 'Hypothalamus', 'qualifier_ui': 'Q000378', 'qualifier_name': 'metabolism', 'is_major_topic': True}, {'descriptor_ui': 'D011149', 'descriptor_name': 'Pons', 'qualifier_ui': 'Q000378', 'qualifier_name': 'metabolism', 'is_major_topic': True}, {'descriptor_ui': 'D013788', 'descriptor_name': 'Thalamus', 'qualifier_ui': 'Q000378', 'qualifier_name': 'metabolism', 'is_major_topic': True}, {'descriptor_ui': 'D000818', 'descriptor_name': 'Animals', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D001479', 'descriptor_name': 'Basal Ganglia', 'qualifier_ui': 'Q000378', 'qualifier_name': 'metabolism', 'is_major_topic': False}, {'descriptor_ui': 'D001479', 'descriptor_name': 'Basal Ganglia', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D001931', 'descriptor_name': 'Brain Mapping', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D004723', 'descriptor_name': 'Endorphins', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D004745', 'descriptor_name': 'Enkephalins', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D007031', 'descriptor_name': 'Hypothalamus', 'qualifier_ui': 'Q000166', 'qualifier_name': 'cytology', 'is_major_topic': False}, {'descriptor_ui': 'D007031', 'descriptor_name': 'Hypothalamus', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D007158', 'descriptor_name': 'Immunologic Techniques', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D009474', 'descriptor_name': 'Neurons', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D009474', 'descriptor_name': 'Neurons', 'qualifier_ui': 'Q000378', 'qualifier_name': 'metabolism', 'is_major_topic': False}, {'descriptor_ui': 'D010286', 'descriptor_name': 'Paraventricular Hypothalamic Nucleus', 'qualifier_ui': 'Q000378', 'qualifier_name': 'metabolism', 'is_major_topic': False}, {'descriptor_ui': 'D010286', 'descriptor_name': 'Paraventricular Hypothalamic Nucleus', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D011149', 'descriptor_name': 'Pons', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D051381', 'descriptor_name': 'Rats', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D013376', 'descriptor_name': 'Substantia Gelatinosa', 'qualifier_ui': 'Q000378', 'qualifier_name': 'metabolism', 'is_major_topic': False}, {'descriptor_ui': 'D013376', 'descriptor_name': 'Substantia Gelatinosa', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D013788', 'descriptor_name': 'Thalamus', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}], 'locations_count': 4, 'locations': [{'is_oa': False, 'landing_page_url': 'https://doi.org/10.1073/pnas.75.3.1591', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S125754415', 'display_name': 'Proceedings of the National Academy of Sciences', 'issn_l': '0027-8424', 'issn': ['0027-8424', '1091-6490'], 'is_oa': False, 'is_in_doaj': False, 'is_core': True, 'host_organization': 'https://openalex.org/P4310320052', 'host_organization_name': 'National Academy of Sciences', 'host_organization_lineage': ['https://openalex.org/P4310320052'], 'host_organization_lineage_names': ['National Academy of Sciences'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}, {'is_oa': True, 'landing_page_url': 'https://europepmc.org/articles/pmc411520', 'pdf_url': 'https://europepmc.org/articles/pmc411520?pdf=render', 'source': {'id': 'https://openalex.org/S4306400806', 'display_name': 'Europe PMC (PubMed Central)', 'issn_l': None, 'issn': None, 'is_oa': True, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/I1303153112', 'host_organization_name': 'European Bioinformatics Institute', 'host_organization_lineage': ['https://openalex.org/I1303153112'], 'host_organization_lineage_names': ['European Bioinformatics Institute'], 'type': 'repository'}, 'license': None, 'license_id': None, 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, {'is_oa': True, 'landing_page_url': 'https://www.ncbi.nlm.nih.gov/pmc/articles/PMC411520', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S2764455111', 'display_name': 'PubMed Central', 'issn_l': None, 'issn': None, 'is_oa': True, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/I1299303238', 'host_organization_name': 'National Institutes of Health', 'host_organization_lineage': ['https://openalex.org/I1299303238'], 'host_organization_lineage_names': ['National Institutes of Health'], 'type': 'repository'}, 'license': None, 'license_id': None, 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, {'is_oa': False, 'landing_page_url': 'https://pubmed.ncbi.nlm.nih.gov/349568', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S4306525036', 'display_name': 'PubMed', 'issn_l': None, 'issn': None, 'is_oa': False, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/I1299303238', 'host_organization_name': 'National Institutes of Health', 'host_organization_lineage': ['https://openalex.org/I1299303238'], 'host_organization_lineage_names': ['National Institutes of Health'], 'type': 'repository'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}], 'best_oa_location': {'is_oa': True, 'landing_page_url': 'https://europepmc.org/articles/pmc411520', 'pdf_url': 'https://europepmc.org/articles/pmc411520?pdf=render', 'source': {'id': 'https://openalex.org/S4306400806', 'display_name': 'Europe PMC (PubMed Central)', 'issn_l': None, 'issn': None, 'is_oa': True, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/I1303153112', 'host_organization_name': 'European Bioinformatics Institute', 'host_organization_lineage': ['https://openalex.org/I1303153112'], 'host_organization_lineage_names': ['European Bioinformatics Institute'], 'type': 'repository'}, 'license': None, 'license_id': None, 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, 'sustainable_development_goals': [], 'grants': [], 'datasets': [], 'versions': [], 'referenced_works_count': 33, 'referenced_works': ['https://openalex.org/W1966891474', 'https://openalex.org/W1967866087', 'https://openalex.org/W1970166414', 'https://openalex.org/W1970569351', 'https://openalex.org/W1972680642', 'https://openalex.org/W1978651683', 'https://openalex.org/W1983910202', 'https://openalex.org/W2001223331', 'https://openalex.org/W2001737392', 'https://openalex.org/W2002607913', 'https://openalex.org/W2005335314', 'https://openalex.org/W2023858395', 'https://openalex.org/W2028185631', 'https://openalex.org/W2030288420', 'https://openalex.org/W2030373311', 'https://openalex.org/W2036455062', 'https://openalex.org/W2039841448', 'https://openalex.org/W2039997015', 'https://openalex.org/W2041935994', 'https://openalex.org/W2046015082', 'https://openalex.org/W2049414447', 'https://openalex.org/W2051120149', 'https://openalex.org/W2051612811', 'https://openalex.org/W2053243081', 'https://openalex.org/W2058142169', 'https://openalex.org/W2069458145', 'https://openalex.org/W2076523452', 'https://openalex.org/W2080779467', 'https://openalex.org/W2082127987', 'https://openalex.org/W2084881904', 'https://openalex.org/W2089462923', 'https://openalex.org/W2422735609', 'https://openalex.org/W4238040573'], 'related_works': ['https://openalex.org/W2480282870', 'https://openalex.org/W2444414351', 'https://openalex.org/W2412258982', 'https://openalex.org/W2411188754', 'https://openalex.org/W2322965063', 'https://openalex.org/W2211700829', 'https://openalex.org/W2108230295', 'https://openalex.org/W2043127059', 'https://openalex.org/W2042249556', 'https://openalex.org/W2022815419'], 'abstract_inverted_index': {'Well-characterized': [0], 'antisera': [1, 100], 'to': [2, 7, 37, 46, 53, 97, 101], 'porcine': [3], 'beta-endorphin': [4, 85], 'were': [5, 51, 67, 88], 'used': [6], 'localize': [8], 'immunoreactive': [9, 86], 'sites': [10], 'in': [11, 40, 113, 138], 'cryostat': [12], 'sections': [13], 'of': [14, 26, 65, 71, 78, 129], 'formaldehyde-fixed': [15], 'rat': [16, 121, 139], 'brain': [17, 140], 'by': [18, 24, 69], 'indirect': [19], 'immunohistochemistry.': [20], 'Specificity': [21], 'was': [22, 35], 'established': [23], 'absorption': [25], 'immune': [27, 73], 'sera': [28, 74], 'with': [29, 75, 99, 110, 119], 'synthetic': [30], 'peptide': [31], 'fragments.': [32], 'Specific': [33], 'immunoreactivity': [34, 109, 130], 'localized': [36], 'neuronal': [38, 135], 'perikarya': [39], 'the': [41, 58, 72, 102, 126], 'basal': [42], 'tuberal': [43], 'hypothalamus,': [44], 'and': [45, 60, 94, 141, 149], 'varicose': [47], 'nerve': [48, 147], 'fibers': [49, 95], 'which': [50], 'distributed': [52], 'midline': [54], 'nuclear': [55], 'areas': [56], 'throughout': [57], 'diencephalon': [59], 'anterior': [61], 'pons.': [62], 'These': [63], 'patterns': [64, 128], 'reactivity': [66], 'unaffected': [68], 'preabsorption': [70], 'millimolar': [76], 'concentrations': [77], 'Met5-': [79], 'or': [80, 82], 'Leu5-enkephalin': [81], 'alpha-endorphin.': [83], 'The': [84], 'structures': [87], 'morphologically': [89], 'separate': [90], 'from': [91, 145], 'those': [92], 'cells': [93], 'reported': [96], 'react': [98], 'enkephalins.': [103], 'One': [104], 'anti-beta-endorphin': [105], 'serum': [106], 'gave': [107], 'additional': [108], 'myelinated': [111], 'axons': [112], 'limbic': [114], 'cortical': [115], 'zones;': [116], 'when': [117], 'absorbed': [118], 'purified': [120], 'myelin': [122], 'basic': [123], 'protein,': [124], 'only': [125], 'specific': [127], 'remained.': [131], 'Thus,': [132], 'discrete': [133], 'beta-endorphin-containing': [134], 'circuits': [136], 'exist': [137], 'are': [142], 'anatomically': [143], 'distinguishable': [144], 'enkephalin-containing': [146], 'cell': [148], 'fiber': [150], 'pathways.': [151]}, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W2039946713', 'counts_by_year': [{'year': 2024, 'cited_by_count': 1}, {'year': 2023, 'cited_by_count': 1}, {'year': 2022, 'cited_by_count': 3}, {'year': 2021, 'cited_by_count': 3}, {'year': 2020, 'cited_by_count': 4}, {'year': 2019, 'cited_by_count': 4}, {'year': 2018, 'cited_by_count': 3}, {'year': 2017, 'cited_by_count': 2}, {'year': 2016, 'cited_by_count': 2}, {'year': 2015, 'cited_by_count': 3}, {'year': 2014, 'cited_by_count': 3}, {'year': 2013, 'cited_by_count': 6}, {'year': 2012, 'cited_by_count': 8}], 'updated_date': '2024-12-14T00:49:44.412046', 'created_date': '2016-06-24'}