@article{MZM_1971_9_1_a5,
     author = {V. M. Kotlov},
     title = {Class close to the class of $n$-abelian groups},
     journal = {Matemati\v{c}eskie zametki},
     pages = {41--51},
     publisher = {mathdoc},
     volume = {9},
     number = {1},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1971_9_1_a5/}
}