%0 Journal Article %A Yu. L. Vasil'ev %T Comparison of the complexity of impasse d.n.f. and minimal d.n.f. %J Doklady Akademii Nauk %D 1961 %P 13-16 %V 137 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1961_137_1_a1/ %G ru %F DAN_1961_137_1_a1