{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2022,4,3]],"date-time":"2022-04-03T21:34:41Z","timestamp":1649021681306},"reference-count":5,"publisher":"Elsevier BV","issue":"1","license":[{"start":{"date-parts":[[1986,1,1]],"date-time":"1986-01-01T00:00:00Z","timestamp":504921600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Information Processing Letters"],"published-print":{"date-parts":[[1986,1]]},"DOI":"10.1016\/0020-0190(86)90034-7","type":"journal-article","created":{"date-parts":[[2003,3,14]],"date-time":"2003-03-14T19:37:33Z","timestamp":1047670653000},"page":"7-9","source":"Crossref","is-referenced-by-count":18,"title":["Every iterated morphism yields a co-CFL"],"prefix":"10.1016","volume":"22","author":[{"given":"Jean","family":"Berstel","sequence":"first","affiliation":[]}],"member":"78","reference":[{"key":"10.1016\/0020-0190(86)90034-7_BIB1","author":"Grazon","year":"1985","journal-title":"Th\u00e8se de troisi\u00e8me cycle"},{"key":"10.1016\/0020-0190(86)90034-7_BIB2","doi-asserted-by":"crossref","first-page":"91","DOI":"10.1145\/321495.321503","article-title":"An infinite hierarchy of context-free languages","volume":"16","author":"Greibach","year":"1969","journal-title":"J. Assoc. Comput. Mach."},{"issue":"2","key":"10.1016\/0020-0190(86)90034-7_BIB3","doi-asserted-by":"crossref","first-page":"105","DOI":"10.1016\/0020-0190(85)90073-0","article-title":"An infinite square-free co-CFL","volume":"20","author":"Main","year":"1985","journal-title":"Inform. Process. Lett."},{"key":"10.1016\/0020-0190(86)90034-7_BIB4","series-title":"12th ICALP","article-title":"Applications of an infinite square-free co-CFL","author":"Main","year":"1985"},{"key":"10.1016\/0020-0190(86)90034-7_BIB5","first-page":"267","article-title":"Nonrepetitive sequences","volume":"68","author":"Pleasants","year":"1970"}],"container-title":["Information Processing Letters"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:0020019086900347?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:0020019086900347?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2019,3,26]],"date-time":"2019-03-26T09:28:50Z","timestamp":1553592530000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/0020019086900347"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1986,1]]},"references-count":5,"journal-issue":{"issue":"1","published-print":{"date-parts":[[1986,1]]}},"alternative-id":["0020019086900347"],"URL":"https:\/\/doi.org\/10.1016\/0020-0190(86)90034-7","relation":{},"ISSN":["0020-0190"],"issn-type":[{"value":"0020-0190","type":"print"}],"subject":[],"published":{"date-parts":[[1986,1]]}}}