{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,8]],"date-time":"2026-01-08T18:41:17Z","timestamp":1767897677522,"version":"3.49.0"},"reference-count":11,"publisher":"Elsevier BV","issue":"2","license":[{"start":{"date-parts":[[1981,4,1]],"date-time":"1981-04-01T00:00:00Z","timestamp":354931200000},"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":11795,"URL":"https:\/\/www.elsevier.com\/open-access\/userlicense\/1.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Discrete Applied Mathematics"],"published-print":{"date-parts":[[1981,4]]},"DOI":"10.1016\/0166-218x(81)90037-8","type":"journal-article","created":{"date-parts":[[2002,7,26]],"date-time":"2002-07-26T03:46:59Z","timestamp":1027655219000},"page":"119-135","source":"Crossref","is-referenced-by-count":23,"title":["Colorings and interpretations: a connection between graphs and grammar forms"],"prefix":"10.1016","volume":"3","author":[{"given":"H.A.","family":"Maurer","sequence":"first","affiliation":[]},{"given":"A.","family":"Salomaa","sequence":"additional","affiliation":[]},{"given":"D.","family":"Wood","sequence":"additional","affiliation":[]}],"member":"78","reference":[{"key":"10.1016\/0166-218X(81)90037-8_BIB1","doi-asserted-by":"crossref","first-page":"346","DOI":"10.4153\/CJM-1961-029-9","article-title":"Graph theory and probability II","volume":"13","author":"Erd\u00f6s","year":"1961","journal-title":"Canad. J. Math."},{"key":"10.1016\/0166-218X(81)90037-8_BIB2","series-title":"Graph Theory","author":"Harary","year":"1972"},{"key":"10.1016\/0166-218X(81)90037-8_BIB3","series-title":"Theoretische Grundlagen der Programmiersprachen","author":"Maurer","year":"1969"},{"key":"10.1016\/0166-218X(81)90037-8_BIB4","doi-asserted-by":"crossref","first-page":"110","DOI":"10.1016\/0022-0000(80)90045-8","article-title":"Context-free grammar forms with strict interpretations","volume":"21","author":"Maurer","year":"1980","journal-title":"J. Comput. System Sci."},{"key":"10.1016\/0166-218X(81)90037-8_BIB5","doi-asserted-by":"crossref","unstructured":"H.A. Maurer, A. Salomaa and D. Wood, Dense hierarchies of grammatical families, J. Assoc. Comput. Mach., to appear.","DOI":"10.1145\/322290.322298"},{"key":"10.1016\/0166-218X(81)90037-8_BIB6","series-title":"Decidability and density in two-symbol grammar forms","author":"Maurer","year":"1979"},{"key":"10.1016\/0166-218X(81)90037-8_BIB7","series-title":"MSW-spaces","author":"Maurer","year":"1980"},{"key":"10.1016\/0166-218X(81)90037-8_BIB8","unstructured":"H.A. Maurer, A. Salomaa and D. Wood, On finite grammar forms, in preparation."},{"key":"10.1016\/0166-218X(81)90037-8_BIB9","series-title":"Computer Science Report","article-title":"Grammar and s-grammar forms: decidability and density","author":"Ottmann","year":"1979"},{"key":"10.1016\/0166-218X(81)90037-8_BIB10","series-title":"Formal Languages","author":"Salomaa","year":"1973"},{"key":"10.1016\/0166-218X(81)90037-8_BIB11","series-title":"Grammar and L Forms: An Introduction","author":"Wood","year":"1980"}],"container-title":["Discrete Applied Mathematics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:0166218X81900378?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:0166218X81900378?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2019,4,13]],"date-time":"2019-04-13T04:28:42Z","timestamp":1555129722000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/0166218X81900378"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1981,4]]},"references-count":11,"journal-issue":{"issue":"2","published-print":{"date-parts":[[1981,4]]}},"alternative-id":["0166218X81900378"],"URL":"https:\/\/doi.org\/10.1016\/0166-218x(81)90037-8","relation":{},"ISSN":["0166-218X"],"issn-type":[{"value":"0166-218X","type":"print"}],"subject":[],"published":{"date-parts":[[1981,4]]}}}