Gruska, Jozef Grammatical levels and subgrammars of context-free grammars. (English) Zbl 0282.68036 Arch. Math., Brno 9, 19-21 (1973). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 Document MSC: 68Q45 Formal languages and automata PDFBibTeX XMLCite \textit{J. Gruska}, Arch. Math. (Brno) 9, 19--21 (1973; Zbl 0282.68036) Full Text: EuDML