@article{DAN_1981_257_5_a6,
     author = {Yu. G. Kleiman},
     title = {On some questions in the theory of varieties of groups},
     journal = {Doklady Akademii Nauk},
     pages = {1056--1059},
     publisher = {mathdoc},
     volume = {257},
     number = {5},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1981_257_5_a6/}
}