@article{AL_1966_5_4_a0,
     author = {A. A. Vinogradov},
     title = {Certain properties of quasi-varieties of nilpotent groups},
     journal = {Algebra i logika},
     pages = {5--14},
     publisher = {mathdoc},
     volume = {5},
     number = {4},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1966_5_4_a0/}
}