@article{AL_1984_23_1_a1,
     author = {S. A. Gurchenkov},
     title = {Varieties of $l$-groups with identity $[x^p,y^p]=e$ are},
     journal = {Algebra i logika},
     pages = {27--47},
     publisher = {mathdoc},
     volume = {23},
     number = {1},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1984_23_1_a1/}
}