@article{AL_1978_17_4_a6,
     author = {D. M. Smirnov},
     title = {The correspondence between regularly definable varieties of},
     journal = {Algebra i logika},
     pages = {468--477},
     year = {1978},
     volume = {17},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1978_17_4_a6/}
}