{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,15]],"date-time":"2026-06-15T22:32:10Z","timestamp":1781562730878,"version":"3.54.5"},"reference-count":2,"publisher":"Elsevier BV","issue":"2","license":[{"start":{"date-parts":[[1982,1,1]],"date-time":"1982-01-01T00:00:00Z","timestamp":378691200000},"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":11520,"URL":"https:\/\/www.elsevier.com\/open-access\/userlicense\/1.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Discrete Mathematics"],"published-print":{"date-parts":[[1982]]},"DOI":"10.1016\/0012-365x(82)90204-7","type":"journal-article","created":{"date-parts":[[2002,7,26]],"date-time":"2002-07-26T03:31:50Z","timestamp":1027654310000},"page":"167-172","source":"Crossref","is-referenced-by-count":83,"title":["On the number of graphs without 4-cycles"],"prefix":"10.1016","volume":"41","author":[{"given":"Daniel J.","family":"Kleitman","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kenneth J.","family":"Winston","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"78","reference":[{"key":"10.1016\/0012-365X(82)90204-7_BIB1","series-title":"Finite Geometries","author":"Dembowski","year":"1968"},{"key":"10.1016\/0012-365X(82)90204-7_BIB2","doi-asserted-by":"crossref","first-page":"243","DOI":"10.1016\/S0167-5060(08)70708-8","article-title":"The asymptotic number of lattices","volume":"6","author":"Kleitman","year":"1980","journal-title":"Ann. Discrete Math."}],"container-title":["Discrete Mathematics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:0012365X82902047?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:0012365X82902047?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2019,4,13]],"date-time":"2019-04-13T11:25:59Z","timestamp":1555154759000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/0012365X82902047"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1982]]},"references-count":2,"journal-issue":{"issue":"2","published-print":{"date-parts":[[1982]]}},"alternative-id":["0012365X82902047"],"URL":"https:\/\/doi.org\/10.1016\/0012-365x(82)90204-7","relation":{},"ISSN":["0012-365X"],"issn-type":[{"value":"0012-365X","type":"print"}],"subject":[],"published":{"date-parts":[[1982]]}}}