{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,9,25]],"date-time":"2025-09-25T18:05:18Z","timestamp":1758823518077},"reference-count":3,"publisher":"Elsevier BV","issue":"1","license":[{"start":{"date-parts":[[1989,2,1]],"date-time":"1989-02-01T00:00:00Z","timestamp":602294400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"},{"start":{"date-parts":[[2013,7,17]],"date-time":"2013-07-17T00:00:00Z","timestamp":1374019200000},"content-version":"vor","delay-in-days":8932,"URL":"https:\/\/www.elsevier.com\/open-access\/userlicense\/1.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Combinatorial Theory, Series B"],"published-print":{"date-parts":[[1989,2]]},"DOI":"10.1016\/0095-8956(89)90009-9","type":"journal-article","created":{"date-parts":[[2005,2,9]],"date-time":"2005-02-09T09:37:08Z","timestamp":1107941828000},"page":"84-95","source":"Crossref","is-referenced-by-count":15,"title":["Minimal quadrangulations of orientable surfaces"],"prefix":"10.1016","volume":"46","author":[{"given":"Nora","family":"Hartsfield","sequence":"first","affiliation":[]},{"given":"Gerhard","family":"Ringel","sequence":"additional","affiliation":[]}],"member":"78","reference":[{"key":"10.1016\/0095-8956(89)90009-9_BIB1","author":"Ringel","year":"1974"},{"key":"10.1016\/0095-8956(89)90009-9_BIB2","doi-asserted-by":"crossref","first-page":"121","DOI":"10.1007\/BF02414187","article-title":"Minimum triangulations of orientable surfaces","volume":"145","author":"Jungerman","year":"1980","journal-title":"Acta Math."},{"key":"10.1016\/0095-8956(89)90009-9_BIB3","first-page":"117","author":"White","year":"1973"}],"container-title":["Journal of Combinatorial Theory, Series B"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:0095895689900099?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:0095895689900099?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2019,1,29]],"date-time":"2019-01-29T10:53:25Z","timestamp":1548759205000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/0095895689900099"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1989,2]]},"references-count":3,"journal-issue":{"issue":"1","published-print":{"date-parts":[[1989,2]]}},"alternative-id":["0095895689900099"],"URL":"https:\/\/doi.org\/10.1016\/0095-8956(89)90009-9","relation":{},"ISSN":["0095-8956"],"issn-type":[{"value":"0095-8956","type":"print"}],"subject":[],"published":{"date-parts":[[1989,2]]}}}