Yntema, M. K. Inclusion relations among families of context-free languages. (English) Zbl 0207.31405 Inf. Control 10, 572-597 (1967). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 15 Documents MSC: 68Q45 Formal languages and automata PDF BibTeX XML Cite \textit{M. K. Yntema}, Inf. Control 10, 572--597 (1967; Zbl 0207.31405) Full Text: DOI