{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2022,4,4]],"date-time":"2022-04-04T15:08:27Z","timestamp":1649084907832},"reference-count":9,"publisher":"Elsevier BV","issue":"1","license":[{"start":{"date-parts":[[1977,2,1]],"date-time":"1977-02-01T00:00:00Z","timestamp":223603200000},"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":13315,"URL":"https:\/\/www.elsevier.com\/open-access\/userlicense\/1.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Computer and System Sciences"],"published-print":{"date-parts":[[1977,2]]},"DOI":"10.1016\/s0022-0000(77)80043-3","type":"journal-article","created":{"date-parts":[[2008,3,25]],"date-time":"2008-03-25T00:09:39Z","timestamp":1206403779000},"page":"130-149","source":"Crossref","is-referenced-by-count":3,"title":["Hypergrammars: An extension of macrogrammars"],"prefix":"10.1016","volume":"14","author":[{"given":"V.J.","family":"Rayward-Smith","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"78","reference":[{"key":"10.1016\/S0022-0000(77)80043-3_bib1","doi-asserted-by":"crossref","first-page":"647","DOI":"10.1145\/321479.321488","article-title":"Indexed grammars: An Extension of context-free grammars","volume":"15","author":"Aho","year":"1968","journal-title":"J. Assoc. Comput. Mach."},{"key":"10.1016\/S0022-0000(77)80043-3_bib2","doi-asserted-by":"crossref","first-page":"134","DOI":"10.1016\/S0019-9958(72)90063-0","article-title":"Equational language","volume":"21","author":"Blikle","year":"1972","journal-title":"Inform Contr."},{"key":"10.1016\/S0022-0000(77)80043-3_bib3","first-page":"113","article-title":"Three models for the description of language","volume":"2","author":"Chomsky","year":"1956","journal-title":"PGIT"},{"key":"10.1016\/S0022-0000(77)80043-3_bib4","doi-asserted-by":"crossref","first-page":"137","DOI":"10.1016\/S0019-9958(59)90362-6","article-title":"On certain formal properties of grammars","volume":"2","author":"Chomsky","year":"1959","journal-title":"Inform. Contr."},{"key":"10.1016\/S0022-0000(77)80043-3_bib5","doi-asserted-by":"crossref","DOI":"10.1109\/SWAT.1968.12","article-title":"Grammars with macro-like productions","author":"Fischer","year":"1968"},{"key":"10.1016\/S0022-0000(77)80043-3_bib6","first-page":"33","article-title":"Independence of AFL operations","volume":"Vol. 87","author":"Greibach","year":"1969"},{"key":"10.1016\/S0022-0000(77)80043-3_bib7","article-title":"From languages to equation sets on lattices","author":"Rayward-Smith","year":"1973"},{"key":"10.1016\/S0022-0000(77)80043-3_bib8","doi-asserted-by":"crossref","first-page":"107","DOI":"10.1145\/321495.321504","article-title":"Programmed grammars and classes of formal languages","volume":"16","author":"Rosenkrantz","year":"1969","journal-title":"J. Assoc. Comput. Mach."},{"key":"10.1016\/S0022-0000(77)80043-3_bib9","series-title":"Proc. 4th Annual Princeton Conference on Information Sciences and Systems","first-page":"169","article-title":"Outline of a mathematical theory of computation","author":"Scott","year":"1970"}],"container-title":["Journal of Computer and System Sciences"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0022000077800433?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0022000077800433?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2019,5,9]],"date-time":"2019-05-09T06:50:00Z","timestamp":1557384600000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S0022000077800433"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1977,2]]},"references-count":9,"journal-issue":{"issue":"1","published-print":{"date-parts":[[1977,2]]}},"alternative-id":["S0022000077800433"],"URL":"https:\/\/doi.org\/10.1016\/s0022-0000(77)80043-3","relation":{},"ISSN":["0022-0000"],"issn-type":[{"value":"0022-0000","type":"print"}],"subject":[],"published":{"date-parts":[[1977,2]]}}}