%0 Journal Article %A E. V. Chuprunov %A T. N. Tarkhova %A N. V. Belov %T On the description of special positions in Shubnikov groups %J Doklady Akademii Nauk %D 1981 %P 885-887 %V 257 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1981_257_4_a23/ %G ru %F DAN_1981_257_4_a23