@article{120209,
author = {Franti\v sek Krutsk\'y},
title = {Reducibility and correspondences of pure generalized grammars},
journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
volume = {27},
year = {1988},
pages = {63-84},
zbl = {0691.68078},
mrnumber = {1039884},
language = {en},
url = {http://dml.mathdoc.fr/item/120209}
}
Krutský, František. Reducibility and correspondences of pure generalized grammars. Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, Tome 27 (1988) pp. 63-84. http://gdmltest.u-ga.fr/item/120209/
One some operators reducing generalized grammars, Information and Control 26, No.З, 1974, 225-235. (1974) | MR 0363019
Constructions of grammars for formal languages, Rukopis.
Homomorphic correspondences of relational systems, AUPO, Fac. rer. nat., Vol 76, Math. XXII (1983), 37-46. (1983) | MR 0744698 | Zbl 0589.20050