{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,23]],"date-time":"2026-04-23T14:50:45Z","timestamp":1776955845388,"version":"3.51.4"},"reference-count":12,"publisher":"Elsevier BV","issue":"1-3","license":[{"start":{"date-parts":[[1994,12,1]],"date-time":"1994-12-01T00:00:00Z","timestamp":786240000000},"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":6803,"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":[[1994,12]]},"DOI":"10.1016\/0012-365x(93)e0100-i","type":"journal-article","created":{"date-parts":[[2002,7,25]],"date-time":"2002-07-25T23:43:34Z","timestamp":1027640614000},"page":"177-191","source":"Crossref","is-referenced-by-count":13,"title":["Extreme convex set functions with many nonnegative differences"],"prefix":"10.1016","volume":"135","author":[{"given":"Franti\u0161ek","family":"Mat\u00fa\u0161","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"78","reference":[{"key":"10.1016\/0012-365X(93)E0100-I_BIB1","author":"Aigner","year":"1979"},{"key":"10.1016\/0012-365X(93)E0100-I_BIB2","first-page":"69","article-title":"Submodular functions, matroids and certain polyhedra","author":"Edmonds","year":"1970"},{"key":"10.1016\/0012-365X(93)E0100-I_BIB3","author":"Gr\u00f6tschel","year":"1988"},{"key":"10.1016\/0012-365X(93)E0100-I_BIB4","author":"Leichtweiss","year":"1980"},{"key":"10.1016\/0012-365X(93)E0100-I_BIB5","doi-asserted-by":"crossref","first-page":"185","DOI":"10.1080\/03081079308935205","article-title":"Probabilistic conditional independence structures and matroid theory: background","volume":"22","author":"Mat\u00fa\u0161","year":"1994","journal-title":"Int. J. Gen. Systems"},{"key":"10.1016\/0012-365X(93)E0100-I_BIB6","first-page":"272","article-title":"Semimodular functions","author":"Nguyen","year":"1986"},{"key":"10.1016\/0012-365X(93)E0100-I_BIB7","author":"Phelps","year":"1966"},{"key":"10.1016\/0012-365X(93)E0100-I_BIB8","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/0022-247X(70)90180-0","article-title":"Submodular functions and independence structures","volume":"30","author":"Pym","year":"1970","journal-title":"J. Math. Anal. Appl."},{"key":"10.1016\/0012-365X(93)E0100-I_BIB9","doi-asserted-by":"crossref","first-page":"343","DOI":"10.1016\/0012-365X(74)90127-7","article-title":"Extreme convex set functions with finite carrier: general theory","volume":"10","author":"Rosenm\u00fcller","year":"1974","journal-title":"Discrete Math."},{"key":"10.1016\/0012-365X(93)E0100-I_BIB10","author":"Studen\u00fd","year":"1991"},{"key":"10.1016\/0012-365X(93)E0100-I_BIB11","doi-asserted-by":"crossref","first-page":"11","DOI":"10.1007\/BF01753431","article-title":"Cores of convex games","volume":"1","author":"Shapley","year":"1971","journal-title":"International Journal of Game Theory"},{"key":"10.1016\/0012-365X(93)E0100-I_BIB12","author":"Widder","year":"1941"}],"container-title":["Discrete Mathematics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:0012365X93E0100I?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:0012365X93E0100I?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2019,4,13]],"date-time":"2019-04-13T02:22:54Z","timestamp":1555122174000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/0012365X93E0100I"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1994,12]]},"references-count":12,"journal-issue":{"issue":"1-3","published-print":{"date-parts":[[1994,12]]}},"alternative-id":["0012365X93E0100I"],"URL":"https:\/\/doi.org\/10.1016\/0012-365x(93)e0100-i","relation":{},"ISSN":["0012-365X"],"issn-type":[{"value":"0012-365X","type":"print"}],"subject":[],"published":{"date-parts":[[1994,12]]}}}