{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,5]],"date-time":"2025-10-05T04:34:50Z","timestamp":1759638890418},"reference-count":9,"publisher":"Elsevier BV","issue":"1-3","license":[{"start":{"date-parts":[[1997,9,1]],"date-time":"1997-09-01T00:00:00Z","timestamp":873072000000},"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":5798,"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":[[1997,9]]},"DOI":"10.1016\/s0012-365x(97)80332-9","type":"journal-article","created":{"date-parts":[[2003,4,23]],"date-time":"2003-04-23T20:16:34Z","timestamp":1051128994000},"page":"247-259","source":"Crossref","is-referenced-by-count":30,"title":["Upper chromatic number of Steiner triple and quadruple systems"],"prefix":"10.1016","volume":"174","author":[{"given":"Lorenzo","family":"Milazzo","sequence":"first","affiliation":[]},{"given":"Zsolt","family":"Tuza","sequence":"additional","affiliation":[]}],"member":"78","reference":[{"key":"10.1016\/S0012-365X(97)80332-9_BIB1","first-page":"352","article-title":"On the combinatory problems of Steiner","volume":"11","author":"Barrau","year":"1908"},{"key":"10.1016\/S0012-365X(97)80332-9_BIB2","first-page":"15","article-title":"Steiner Triple Systems with small maximal independent sets","volume":"17","author":"Brandes","year":"1984","journal-title":"Ars Combin."},{"key":"10.1016\/S0012-365X(97)80332-9_BIB3","first-page":"393","article-title":"Non-isomorphic Steiner quadruple systems","volume":"23","author":"Doyen","year":"1971","journal-title":"Bull. Soc. Math. Belg"},{"key":"10.1016\/S0012-365X(97)80332-9_BIB4","doi-asserted-by":"crossref","first-page":"263","DOI":"10.1016\/0012-365X(93)90161-L","article-title":"2-colourings in S(t,t + 1, v)","volume":"111","author":"Gionfriddo","year":"1993","journal-title":"Discrete Math."},{"key":"10.1016\/S0012-365X(97)80332-9_BIB5","doi-asserted-by":"crossref","first-page":"145","DOI":"10.4153\/CJM-1960-013-3","article-title":"On quadruple systems","volume":"12","author":"Hanani","year":"1960","journal-title":"Canad. J. Math."},{"key":"10.1016\/S0012-365X(97)80332-9_BIB6","doi-asserted-by":"crossref","first-page":"147","DOI":"10.1016\/0012-365X(78)90122-X","article-title":"Steiner quadruple systems: a survey","volume":"22","author":"Lindner","year":"1968","journal-title":"Discrete Math."},{"key":"10.1016\/S0012-365X(97)80332-9_BIB7","unstructured":"L. Milazzo and Zs. Tuza, Strict colourings of Steiner systems, in preparation."},{"key":"10.1016\/S0012-365X(97)80332-9_BIB8","first-page":"45","article-title":"The mixed hypergraphs","volume":"1","author":"Voloshin","year":"1993","journal-title":"Comput. Sci. J. Moldova"},{"key":"10.1016\/S0012-365X(97)80332-9_BIB9","first-page":"25","article-title":"On the upper chromatic number of a hypergraph","volume":"11","author":"Voloshin","year":"1995","journal-title":"Australasian J. Combin."}],"container-title":["Discrete Mathematics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0012365X97803329?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0012365X97803329?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2019,4,24]],"date-time":"2019-04-24T18:29:09Z","timestamp":1556130549000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S0012365X97803329"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1997,9]]},"references-count":9,"journal-issue":{"issue":"1-3","published-print":{"date-parts":[[1997,9]]}},"alternative-id":["S0012365X97803329"],"URL":"https:\/\/doi.org\/10.1016\/s0012-365x(97)80332-9","relation":{},"ISSN":["0012-365X"],"issn-type":[{"value":"0012-365X","type":"print"}],"subject":[],"published":{"date-parts":[[1997,9]]}}}