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@article{AL_1969_8_1_a1, author = {A. Ya. Dikovsky}, title = {The correlation between the class of all context-free languages}, journal = {Algebra i logika}, pages = {44--64}, publisher = {mathdoc}, volume = {8}, number = {1}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1969_8_1_a1/} }
A. Ya. Dikovsky. The correlation between the class of all context-free languages. Algebra i logika, Tome 8 (1969) no. 1, pp. 44-64. http://geodesic.mathdoc.fr/item/AL_1969_8_1_a1/