On a classification of context-free languages
Kybernetika, Tome 3 (1967) no. 1, pp. 22-29 Cet article a éte moissonné depuis la source Czech Digital Mathematics Library

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     author = {Gruska, Jozef},
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Gruska, Jozef. On a classification of context-free languages. Kybernetika, Tome 3 (1967) no. 1, pp. 22-29. http://geodesic.mathdoc.fr/item/KYB_1967_3_1_a1/

[1] N. Chomsky: Formal Properties of Grammars. Handbook of Mathematical Psychology Vol. 2. Willey, New York, 1963. | Zbl

[2] K. Čulík: On equivalent and similar grammars of ALGOL-like languages. Comm. Math. Univ. Carol. 5 (1964), 57-59. | MR

[3] S. Ginsburg H. G. Rice: Two Families of Languages Related to ALGOL. JACM 9 (1962), 350-371. | MR

[4] J. Gruska: On sets generated by context-free grammars. Kybernetika 2 (1966), 6, 483 - 493. | MR | Zbl