@article{SM_1968_6_3_a5,
     author = {G. K. Genov},
     title = {New families of {Mal'cev} operations},
     journal = {Sbornik. Mathematics},
     pages = {407--426},
     publisher = {mathdoc},
     volume = {6},
     number = {3},
     year = {1968},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1968_6_3_a5/}
}