@article{DAN_1981_257_4_a23,
     author = {E. V. Chuprunov and T. N. Tarkhova and N. V. Belov},
     title = {On the description of special positions in {Shubnikov} groups},
     journal = {Doklady Akademii Nauk},
     pages = {885--887},
     publisher = {mathdoc},
     volume = {257},
     number = {4},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1981_257_4_a23/}
}