@article{AL_1998_37_3_a8,
     author = {V. T. Filippov},
     title = {Nil-elements of index $2$ in {Mal'tsev} algebras},
     journal = {Algebra i logika},
     pages = {358--373},
     publisher = {mathdoc},
     volume = {37},
     number = {3},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1998_37_3_a8/}
}