@misc{AL_1991_30_2_a7,
     title = {Sessions of the seminar {{\textquotedblleft}Algebra} i {Logika{\textquotedblright}}},
     journal = {Algebra i logika},
     pages = {252},
     publisher = {mathdoc},
     volume = {30},
     number = {2},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1991_30_2_a7/}
}