@article{DAN_1958_122_5_a2,
     author = {S. R. Kogalovskii},
     title = {Universal classes of algebras},
     journal = {Doklady Akademii Nauk},
     pages = {759--761},
     publisher = {mathdoc},
     volume = {122},
     number = {5},
     year = {1958},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1958_122_5_a2/}
}