@article{MZM_1991_50_2_a17,
     author = {E. I. Khukhro},
     title = {Nilpotency in varieties of groups with operators},
     journal = {Matemati\v{c}eskie zametki},
     pages = {142--145},
     publisher = {mathdoc},
     volume = {50},
     number = {2},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1991_50_2_a17/}
}