68F05
- : Descriptional complexity measures of context-free languages. (English). Kybernetika, vol. 19 (1983), issue 3, pp. 237-247
- : Contextual grammars vs. context-free algebras. (English). Czechoslovak Mathematical Journal, vol. 32 (1982), issue 4, pp. 529-547
- : On one definition of grammatical categories. (English). Sborník prací Přírodovědecké fakulty University Palackého v Olomouci. Matematika, vol. 19 (1980), issue 1, pp. 75-87
- : Equations associated with a context-free grammar. (English). Kybernetika, vol. 15 (1979), issue 4, pp. (253)-260
- : A note on connections between 0L-languages and context-free languages. (English). Kybernetika, vol. 15 (1979), issue 2, pp. (136)-140
- : Two infinite hierarchies of languages defined by branching grammars. (English). Kybernetika, vol. 14 (1978), issue 6, pp. (397)-407
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