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@article{DAN_1972_207_4_a3, author = {M. Lomkovskaya}, title = {Conditional grammars and intermediate classes of languages}, journal = {Doklady Akademii Nauk}, pages = {781--784}, publisher = {mathdoc}, volume = {207}, number = {4}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1972_207_4_a3/} }
M. Lomkovskaya. Conditional grammars and intermediate classes of languages. Doklady Akademii Nauk, Tome 207 (1972) no. 4, pp. 781-784. http://geodesic.mathdoc.fr/item/DAN_1972_207_4_a3/