@article{MZM_1986_40_5_a2,
     author = {A. N. Fedorov},
     title = {Quasi-identities of a free 2-nilpotent group},
     journal = {Matemati\v{c}eskie zametki},
     pages = {590--597},
     publisher = {mathdoc},
     volume = {40},
     number = {5},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1986_40_5_a2/}
}