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@article{AL_1966_5_3_a3, author = {V. D. Luchkin}, title = {Ranks of configurations of context-free languages}, journal = {Algebra i logika}, pages = {59--70}, publisher = {mathdoc}, volume = {5}, number = {3}, year = {1966}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1966_5_3_a3/} }
V. D. Luchkin. Ranks of configurations of context-free languages. Algebra i logika, Tome 5 (1966) no. 3, pp. 59-70. http://geodesic.mathdoc.fr/item/AL_1966_5_3_a3/