{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,30]],"date-time":"2026-01-30T21:31:50Z","timestamp":1769808710268,"version":"3.49.0"},"reference-count":8,"publisher":"Elsevier BV","issue":"1-3","license":[{"start":{"date-parts":[[1998,2,1]],"date-time":"1998-02-01T00:00:00Z","timestamp":886291200000},"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":5645,"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":[[1998,2]]},"DOI":"10.1016\/s0012-365x(97)00122-2","type":"journal-article","created":{"date-parts":[[2002,7,25]],"date-time":"2002-07-25T15:07:02Z","timestamp":1027609622000},"page":"45-64","source":"Crossref","is-referenced-by-count":14,"title":["A methodology for plane tree enumeration"],"prefix":"10.1016","volume":"180","author":[{"given":"Elena","family":"Barcucci","sequence":"first","affiliation":[]},{"given":"Alberto Del","family":"Lungo","sequence":"additional","affiliation":[]},{"given":"Elisa","family":"Pergola","sequence":"additional","affiliation":[]},{"given":"Renzo","family":"Pinzani","sequence":"additional","affiliation":[]}],"member":"78","reference":[{"key":"10.1016\/S0012-365X(97)00122-2_bib1","doi-asserted-by":"crossref","first-page":"254","DOI":"10.1007\/BFb0030840","article-title":"A construction for enumerating k-coloured Motzkin paths","volume":"vol. 959","author":"Barcucci","year":"1995","journal-title":"Lecture Notes in Computers Science"},{"key":"10.1016\/S0012-365X(97)00122-2_bib2","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/0012-365X(95)00003-F","article-title":"A method for the enumeration of various classes of column-convex polygons","volume":"154","author":"Bousquet-M\u00e9lou","year":"1996","journal-title":"Discrete Math."},{"key":"10.1016\/S0012-365X(97)00122-2_bib3","series-title":"Advanced Combinatorics","author":"Comtet","year":"1974"},{"key":"10.1016\/S0012-365X(97)00122-2_bib4","doi-asserted-by":"crossref","first-page":"114","DOI":"10.1016\/0095-8956(77)90003-X","article-title":"Restricted plane tree representations of four Motzkin-Catalan equations","volume":"22","author":"Donaghey","year":"1977","journal-title":"J. Combin. Theory B"},{"key":"10.1016\/S0012-365X(97)00122-2_bib5","doi-asserted-by":"crossref","first-page":"291","DOI":"10.1016\/0097-3165(77)90020-6","article-title":"Motzkin numbers","volume":"23","author":"Donaghey","year":"1977","journal-title":"J. Combin. Theory A"},{"key":"10.1016\/S0012-365X(97)00122-2_bib6","series-title":"Grammaires d'objets, Rapport Labri 383\u201394","author":"Dutour","year":"1994"},{"key":"10.1016\/S0012-365X(97)00122-2_bib7","first-page":"112","article-title":"Elements of general theory of combinatorial structures","volume":"vol. 199","author":"Flajolet","year":"1985"},{"key":"10.1016\/S0012-365X(97)00122-2_bib8","series-title":"Combinatorial Enumeration","author":"Goulden","year":"1983"}],"container-title":["Discrete Mathematics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0012365X97001222?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0012365X97001222?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2019,4,22]],"date-time":"2019-04-22T21:27:41Z","timestamp":1555968461000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S0012365X97001222"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1998,2]]},"references-count":8,"journal-issue":{"issue":"1-3","published-print":{"date-parts":[[1998,2]]}},"alternative-id":["S0012365X97001222"],"URL":"https:\/\/doi.org\/10.1016\/s0012-365x(97)00122-2","relation":{},"ISSN":["0012-365X"],"issn-type":[{"value":"0012-365X","type":"print"}],"subject":[],"published":{"date-parts":[[1998,2]]}}}