Get quick answers to your questions about the article from our AI researcher chatbot
{'id': 'https://openalex.org/W2505264567', 'doi': 'https://doi.org/10.1142/9789812810045_0004', 'title': 'THE SIGMA MODEL', 'display_name': 'THE SIGMA MODEL', 'publication_year': 2001, 'publication_date': '2001-07-01', 'ids': {'openalex': 'https://openalex.org/W2505264567', 'doi': 'https://doi.org/10.1142/9789812810045_0004', 'mag': '2505264567'}, 'language': None, 'primary_location': {'is_oa': False, 'landing_page_url': 'https://doi.org/10.1142/9789812810045_0004', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S4306464320', 'display_name': 'WORLD SCIENTIFIC eBooks', 'issn_l': None, 'issn': None, 'is_oa': False, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/P4310319815', 'host_organization_name': 'World Scientific', 'host_organization_lineage': ['https://openalex.org/P4310319815'], 'host_organization_lineage_names': ['World Scientific'], 'type': 'ebook platform'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}, 'type': 'book-chapter', 'type_crossref': 'book-chapter', 'indexed_in': ['crossref'], 'open_access': {'is_oa': False, 'oa_status': 'closed', 'oa_url': None, 'any_repository_has_fulltext': False}, 'authorships': [], 'institution_assertions': [], 'countries_distinct_count': 0, 'institutions_distinct_count': 0, 'corresponding_author_ids': [], 'corresponding_institution_ids': [], 'apc_list': None, 'apc_paid': None, 'fwci': 0.0, 'has_fulltext': False, 'cited_by_count': 1, 'citation_normalized_percentile': None, 'cited_by_percentile_year': {'min': 59, 'max': 66}, 'biblio': {'volume': None, 'issue': None, 'first_page': '91', 'last_page': '116'}, 'is_retracted': False, 'is_paratext': False, 'primary_topic': None, 'topics': [], 'keywords': [{'id': 'https://openalex.org/keywords/sigma', 'display_name': 'Sigma', 'score': 0.5308838}], 'concepts': [{'id': 'https://openalex.org/C2778049214', 'wikidata': 'https://www.wikidata.org/wiki/Q7512234', 'display_name': 'Sigma', 'level': 2, 'score': 0.5308838}, {'id': 'https://openalex.org/C23119410', 'wikidata': 'https://www.wikidata.org/wiki/Q236908', 'display_name': 'Six Sigma', 'level': 3, 'score': 0.47929448}, {'id': 'https://openalex.org/C121332964', 'wikidata': 'https://www.wikidata.org/wiki/Q413', 'display_name': 'Physics', 'level': 0, 'score': 0.2173836}, {'id': 'https://openalex.org/C185592680', 'wikidata': 'https://www.wikidata.org/wiki/Q2329', 'display_name': 'Chemistry', 'level': 0, 'score': 0.18620083}, {'id': 'https://openalex.org/C1276947', 'wikidata': 'https://www.wikidata.org/wiki/Q333', 'display_name': 'Astronomy', 'level': 1, 'score': 0.044847667}, {'id': 'https://openalex.org/C43617362', 'wikidata': 'https://www.wikidata.org/wiki/Q170050', 'display_name': 'Chromatography', 'level': 1, 'score': 0.03587225}, {'id': 'https://openalex.org/C34146451', 'wikidata': 'https://www.wikidata.org/wiki/Q5048094', 'display_name': 'Cascade', 'level': 2, 'score': 0.0}], 'mesh': [], 'locations_count': 1, 'locations': [{'is_oa': False, 'landing_page_url': 'https://doi.org/10.1142/9789812810045_0004', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S4306464320', 'display_name': 'WORLD SCIENTIFIC eBooks', 'issn_l': None, 'issn': None, 'is_oa': False, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/P4310319815', 'host_organization_name': 'World Scientific', 'host_organization_lineage': ['https://openalex.org/P4310319815'], 'host_organization_lineage_names': ['World Scientific'], 'type': 'ebook platform'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}], 'best_oa_location': None, 'sustainable_development_goals': [], 'grants': [], 'datasets': [], 'versions': [], 'referenced_works_count': 0, 'referenced_works': [], 'related_works': ['https://openalex.org/W594616480', 'https://openalex.org/W2725982103', 'https://openalex.org/W2376050517', 'https://openalex.org/W2129930794', 'https://openalex.org/W2091320486', 'https://openalex.org/W2018304657', 'https://openalex.org/W2012465829', 'https://openalex.org/W2010530423', 'https://openalex.org/W1819446', 'https://openalex.org/W1601839798'], 'abstract_inverted_index': None, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W2505264567', 'counts_by_year': [], 'updated_date': '2024-11-23T21:11:57.637790', 'created_date': '2016-08-23'}