@article{IM2_1973_7_1_a3,
     author = {Yu. G. Kleiman},
     title = {On a~basis of the product of varieties of groups},
     journal = {Izvestiya. Mathematics },
     pages = {91--94},
     publisher = {mathdoc},
     volume = {7},
     number = {1},
     year = {1973},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1973_7_1_a3/}
}