[1] Novotný M.:
Algebraic structures of mathematical linguistics. Bull. Math. de la Soc. Sci Math. de la R. S. de Roumanie 12 (60) (1969), 87-101.
MR 0265086
[2] Kulagina O. S.: Ob odnom sposobe opredelenija grammatičeskich ponjatij na baze teorii množestv. Problemy kibernetiki 1 (1958), 203-214.
[3] Gladkij A. V.:
Konfiguracionnye charakteristiki jazykov. Problemy kibernetiki 10 (1963), 251-260.
MR 0184815
[4] Novotný M.:
On configurations in the sense of Kulagina. Publ. Fac. Sci. Univ. J. E. Purkyně Brno No 507 (1969), 301-316.
MR 0280307
[5] Ginsburg S.:
The Mathematical Theory of Context-Free Languages. Mc Graw-Hill, New York 1966.
MR 0211815 |
Zbl 0184.28401
[6] Ginsburg S., Harison M. A.: Bracketed context free languages. System Development Corp. Rept. TM-738/023/00 Jan. 4, 1966.