{“id”：“https://openalex.org/W4211252629“，”doi“：”https://doi.org/10.1016/s0012-365x网址（01）00247-3“，”title“：“前言”，”display_name“：”前言“，”publication_year“：2002，”publiation_date“：”2002-03-01“，”ids“：{”openalex“：”https://openalex.org/W4211252629“，”doi“：”https://doi.org/10.1016/s0012-365x网址（01）00247-3“}，”language“：null，”primary_location“：{”is_oa“：true，”landing_page_url“：”https://doi.org/10.1016/s0012-365x网址（01）00247-3“，”pdf_url“：空，”源“：{”id“：”https://openalex.org/S18902827“，”display_name“：”离散数学“，”issn_l“：”0012-365X“，”isn“：[”0012-365X“，“1872-681X”]，”is_oa“：false，”is_ in_doaj“：false，”host_organization“：”https://openalex.org/P4310320990“，”“host_organization_name”：“Elsevier BV”，“host_organization_lineage”：[“https://openalex.org/P4310320990“]，”host_organization_lineage_names“：[”Elsevier BV“]，“type”：“journal”}，“license”：“publisher-specific-oa”，“licence_id”：“https://openalex.org/licenses/publisher-specific-oa“，”version“：”publishedVersion“，”is_accepted“：true，”is_published“：true}，”type“：”article“，”type_crossref“：“journal-article”，”indexed_in“：[”crossref“]，”open_access“：{”is_oa“：true，”oa_status“：”青铜“，”oa_url“：”https://doi.org/10.1016/0012-365x（01）00247-3“，”any_repository_has_fulltext“：false}，”authorships“：[{”author_position“：”first“，”auther“：{”id“：”https://openalex.org/A5040359504“，”display_name“：”Robert Cori“，”orcid“：null}，”institutions“：[]，”countries“：[]，”is_corresponding“：false，”raw_author_name“:”Robert Cori“，“raw_affiliation_strings”：[]}，{”author_position“：”last“，”author“：{”id“：”https://openalex.org/A5083605241“，”display_name“：”Marc Noy“，”orcid“：”https://orcid.org/0000-0002-2399-1359“}，”机构“：[]，”国家“：[[]，”is_corresponding“：false，”raw_author_name“：”Marc Noy“，”raw关联字符串“：[]}]，”countries_distict_count“：0，”institutions_disticent_count“：零，”corresponding_author_ids“：[]，“correspounding_institution_ids”：[]、“apc_list”：{“value”：3000，“currency”：“USD”，“value_USD”：3000”，“起源”：“doaj”}，“apc_payed”：{“value“：3000，”currency“：“USD”，“value_USD”：3000，“provenance”：“doaj”}，“has_fulltext”：false，“cited_by_count”：0，“cited_by_percentile_year”：{“min”：0、“max”：61}，”biblio“：{”volume“：”246“，”issue“：”1-3“，”first_page“：”“1”，“last_page”：“1”}、“is_retracted”：false，“is_paratext”：false，“primary_topic”“：null，”主题“：[]，”关键字“：[[]，”概念“：[{”id“：”https://openalex.org/C33923547，“wikidata”：https://www.wikidata.org/wiki/Q395“，”display_name“：”数学“，”等级“：0，”分数“：0.7748257}，{”id“：”https://openalex.org/C114614502，“wikidata”：https://www.wikidata.org/wiki/Q76592“，”display_name“：”组合数学“，”level“：1，”score“：0.4886287}，{”id“：”https://openalex.org/C118615104，“wikidata”：https://www.wikidata.org/wiki/Q121416“，”display_name“：”离散数学“，”level“：1，”score“：0.41731045}]，”mesh“：[]，”locations_count“：1.”locations“：[{”is_oa“：true，”landing_page_url“：”https://doi.org/10.1016/s0012-365x网址（01）00247-3“，”pdf_url“：空，”源“：{”id“：”https://openalex.org/S18902827“，”display_name“：”离散数学“，”issn_l“：”0012-365X“，”isn“：[”0012-365X“，“1872-681X”]，”is_oa“：false，”is_ in_doaj“：false，”host_organization“：”https://openalex.org/P4310320990“，”“host_organization_name”：“Elsevier BV”，“host_organization_lineage”：[“https://openalex.org/P4310320990“]，”host_organization_lineage_names“：[”Elsevier BV“]，“type”：“journal”}，“license”：“publisher-specific-oa”，“licence_id”：“https://openalex.org/licenses/publisher-specific-oa“，”version“：”publishedVersion“，”is_accepted“：true，”is_published“：true}]，”best_oa_location“：{”is_oa“：true，”landing_page_url“：”https://doi.org/10.1016/s0012-365x网址（01）00247-3“，”pdf_url“：空，”源“：{”id“：”https://openalex.org/S18902827“，”display_name“：”离散数学“，”issn_l“：”0012-365X“，”isn“：[”0012-365X“，“1872-681X”]，”is_oa“：false，”is_ in_doaj“：false，”host_organization“：”https://openalex.org/P4310320990“，”“host_organization_name”：“Elsevier BV”，“host_organization_lineage”：[“https://openalex.org/P4310320990“]，”host_organization_lineage_names“：[”Elsevier BV“]，“type”：“journal”}，“license”：“publisher-specific-oa”，“licence_id”：“https://openalex.org/licenses/publisher-specific-oa“，”version“：”publishedVersion“，”is_accepted“：true，”is_published“：true}，”sustainable_development_goals“：[]，”grants“：[]，”datasets“：]，”versions“：[https://openalex.org/W4245490552","https://openalex.org/W4225152035","https://openalex.org/W3002753104","https://openalex.org/W2911598644","https://openalex.org/W2142036596","https://openalex.org/W2077600819","https://openalex.org/W2061531152","https://openalex.org/W2007980826","https://openalex.org/W1979597421","https://openalex.org/W1587224694“]，”ngrams_url“：”https://api.openalex.org/works/W4211252629/ngrams网站“，”abstract_inverted_index“：空，”cited_by_api_url“：”https://api.openalex.org/works？filter=cites:W4211252629“，”counts_by_year“：[]，”updated_date“：”2024-05-27T22:19:53.499379“，”created_date:“2022-02-13”}“