@article{AL_2003_42_5_a4,
     author = {V. M. Kopytov and J. Rach\r{u}nek},
     title = {The {Greatest} {Proper} {Variety} of $m${-Groups}},
     journal = {Algebra i logika},
     pages = {624--635},
     publisher = {mathdoc},
     volume = {42},
     number = {5},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2003_42_5_a4/}
}