@article{AL_1972_11_6_a5,
     author = {Yu. N. Mal'tsev},
     title = {Certain properties of a product of varieties of associative},
     journal = {Algebra i logika},
     pages = {673--688},
     year = {1972},
     volume = {11},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1972_11_6_a5/}
}