@article{ZVMMF_1968_8_2_a10,
     author = {E. A. Zhogolev and V. \v{S}. Kaufman},
     title = {An improved class of grammars served by a concept separation algorithm},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {403--410},
     year = {1968},
     volume = {8},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1968_8_2_a10/}
}