[1] Birkhoff G.: Teoria struktur. Izdatel'stvo inostrannoj literatury, Moscow 1952.
[2] Ginsburg S.:
The Mathematical Theory of Context-free Languages. Mc Graw-Hill Book Company, Inc., 1966.
MR 0211815 |
Zbl 0184.28401
[3] Hopcroft J. E., Ullman J. D.:
Formal Languages and Their Relation to Automata. Adison-Wesley Publishing Company, Inc., 1969
MR 0237243 |
Zbl 0196.01701
[4] Kunze J.:
Versuch eines objektivierten Grammatikmodells I, II. Z. Phonetik Sprachwiss. Kommunikat., 20, 1967, 415-448 and 21, 1968 421-466.
MR 0663591
[5] Kunze J., Priess W.:
Versuch eines objektivierten Grammatikmodells III. Z. Phonetik Sprachwiss. Kommunikat., 23, 1970, 345-378.
MR 0663746
[6] Novotný M.: Abstract Grammatical Categories. in print (Pragues Studies in Mathematical Linguistics).
[8] Szász G.:
Introduction to the Lattice Theory. Publishing House of the Hungarian Academy of Sciences, Budapest, 1962.
MR 0166118