{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,12]],"date-time":"2026-05-12T03:47:05Z","timestamp":1778557625513,"version":"3.51.4"},"reference-count":8,"publisher":"Elsevier BV","issue":"1-3","license":[{"start":{"date-parts":[[2003,8,1]],"date-time":"2003-08-01T00:00:00Z","timestamp":1059696000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"},{"start":{"date-parts":[[2013,8,22]],"date-time":"2013-08-22T00:00:00Z","timestamp":1377129600000},"content-version":"vor","delay-in-days":3674,"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":[[2003,8]]},"DOI":"10.1016\/s0012-365x(02)00838-5","type":"journal-article","created":{"date-parts":[[2003,2,4]],"date-time":"2003-02-04T20:48:55Z","timestamp":1044391735000},"page":"267-278","source":"Crossref","is-referenced-by-count":13,"title":["Enumeration of labelled chain graphs and labelled essential directed acyclic graphs"],"prefix":"10.1016","volume":"270","author":[{"given":"Bertran","family":"Steinsky","sequence":"first","affiliation":[]}],"member":"78","reference":[{"issue":"2","key":"10.1016\/S0012-365X(02)00838-5_BIB1","doi-asserted-by":"crossref","first-page":"502","DOI":"10.1214\/aos\/1031833662","article-title":"A characterization of Markov equivalence classes for acyclic digraphs","volume":"25","author":"Andersson","year":"1997","journal-title":"Ann. Statist."},{"key":"10.1016\/S0012-365X(02)00838-5_BIB2","series-title":"Combinatorial Enumeration","author":"Goulden","year":"1983"},{"key":"10.1016\/S0012-365X(02)00838-5_BIB3","series-title":"Structural Models: An Introduction to the Theory of Graphs","author":"Harary","year":"1965"},{"key":"10.1016\/S0012-365X(02)00838-5_BIB4","series-title":"Graphical Enumeration","author":"Harary","year":"1973"},{"key":"10.1016\/S0012-365X(02)00838-5_BIB5","series-title":"New Directions in the Theory of Graphs","first-page":"239","article-title":"Counting labeled acyclic digraphs","author":"Robinson","year":"1973"},{"key":"10.1016\/S0012-365X(02)00838-5_BIB6","doi-asserted-by":"crossref","first-page":"28","DOI":"10.1007\/BFb0069178","article-title":"Counting unlabeled acyclic digraphs","volume":"622","author":"Robinson","year":"1977","journal-title":"Lecture Notes Math."},{"key":"10.1016\/S0012-365X(02)00838-5_BIB7","doi-asserted-by":"crossref","unstructured":"T. Verma, J. Pearl, An algorithm for deciding if a set of observed independencies has a causal explanation, in: D. Dubois, M.P. Wellman, B. D'Ambrosio, P. Smets (Eds.), Uncertainty in Artificial Intelligence, Proceedings of the Eighth Conference, Morgan Kaufman, San Francisco, 1992, pp. 323\u2013330.","DOI":"10.1016\/B978-1-4832-8287-9.50049-9"},{"key":"10.1016\/S0012-365X(02)00838-5_BIB8","doi-asserted-by":"crossref","first-page":"193","DOI":"10.1007\/BF02582944","article-title":"Counting labelled chordal graphs","volume":"1","author":"Wormald","year":"1985","journal-title":"Graphs Combin."}],"container-title":["Discrete Mathematics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0012365X02008385?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0012365X02008385?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2021,6,3]],"date-time":"2021-06-03T15:13:30Z","timestamp":1622733210000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S0012365X02008385"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2003,8]]},"references-count":8,"journal-issue":{"issue":"1-3","published-print":{"date-parts":[[2003,8]]}},"alternative-id":["S0012365X02008385"],"URL":"https:\/\/doi.org\/10.1016\/s0012-365x(02)00838-5","relation":{},"ISSN":["0012-365X"],"issn-type":[{"value":"0012-365X","type":"print"}],"subject":[],"published":{"date-parts":[[2003,8]]}}}