{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,13]],"date-time":"2026-01-13T03:48:45Z","timestamp":1768276125202,"version":"3.49.0"},"reference-count":10,"publisher":"Elsevier BV","issue":"4","license":[{"start":{"date-parts":[[1967,12,1]],"date-time":"1967-12-01T00:00:00Z","timestamp":-65836800000},"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":16665,"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":[[1967,12]]},"DOI":"10.1016\/s0022-0000(67)80022-9","type":"journal-article","created":{"date-parts":[[2010,11,10]],"date-time":"2010-11-10T09:46:40Z","timestamp":1289382400000},"page":"317-322","source":"Crossref","is-referenced-by-count":168,"title":["Characterizing derivation trees of context-free grammars through a generalization of finite automata theory"],"prefix":"10.1016","volume":"1","author":[{"given":"J.W.","family":"Thatcher","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"78","reference":[{"key":"10.1016\/S0022-0000(67)80022-9_bib1","series-title":"Structure of Language and Its Mathematical Aspects","first-page":"6","article-title":"On the notion of \u2018rule of grammar\u2019","volume":"Vol. XII","author":"Chomsky","year":"1961"},{"key":"10.1016\/S0022-0000(67)80022-9_bib2","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/S0022-0000(67)80003-5","volume":"1","author":"Ginsburg","year":"1967","journal-title":"J. Computer Syst. Sci."},{"key":"10.1016\/S0022-0000(67)80022-9_bib3","unstructured":"J. Doner. Decision Problems of Second-order Logic, (unpublished)."},{"key":"10.1016\/S0022-0000(67)80022-9_bib4","article-title":"Generalized finite automata theory with an application to a decision problem of second-order logic","author":"Thatcher","year":"1966","journal-title":"IBM Res. Rept. RC 1713"},{"key":"10.1016\/S0022-0000(67)80022-9_bib5","article-title":"A further generalization of finite automata","author":"Thatcher","year":"1967","journal-title":"IBM Res. Rept. RC 1846"},{"key":"10.1016\/S0022-0000(67)80022-9_bib6","article-title":"Mathematical Theory of Automata, notes on material presented by J. R. B\u00fcchi and J. B. Wright","author":"B\u00fcchi","year":"1960"},{"key":"10.1016\/S0022-0000(67)80022-9_bib7","first-page":"114","article-title":"Finite automata and their decision problems","volume":"3","author":"Rabin","year":"1959-1964"},{"key":"10.1016\/S0022-0000(67)80022-9_bib8","first-page":"820","article-title":"Abstract 65T-469","volume":"12","author":"Thatcher","year":"1965","journal-title":"Notices Am. Math. Soc."},{"key":"10.1016\/S0022-0000(67)80022-9_bib9","doi-asserted-by":"crossref","first-page":"137","DOI":"10.1016\/S0019-9958(59)90362-6","volume":"2","author":"Chomsky","year":"1959","journal-title":"Inform. Control"},{"key":"10.1016\/S0022-0000(67)80022-9_bib10","author":"Ginsburg","year":"1966"}],"container-title":["Journal of Computer and System Sciences"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0022000067800229?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0022000067800229?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2018,12,6]],"date-time":"2018-12-06T23:55:09Z","timestamp":1544140509000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S0022000067800229"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1967,12]]},"references-count":10,"journal-issue":{"issue":"4","published-print":{"date-parts":[[1967,12]]}},"alternative-id":["S0022000067800229"],"URL":"https:\/\/doi.org\/10.1016\/s0022-0000(67)80022-9","relation":{},"ISSN":["0022-0000"],"issn-type":[{"value":"0022-0000","type":"print"}],"subject":[],"published":{"date-parts":[[1967,12]]}}}