%0 Journal Article %A A. A. Voronkov %A V. V. Ilyukhin %A N. V. Belov %T On principles of the formation of mixed frameworks and their formula %J Doklady Akademii Nauk %D 1974 %P 600-603 %V 219 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1974_219_3_a20/ %G ru %F DAN_1974_219_3_a20