@article{AL_1992_31_6_a2,
     author = {V. D. Mazurov},
     title = {On a question of {L.} {A.} {Shemetkov}},
     journal = {Algebra i logika},
     pages = {624--636},
     publisher = {mathdoc},
     volume = {31},
     number = {6},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1992_31_6_a2/}
}