%0 Journal Article %A Z. I. Kozlova %T The principle of comparison of indices and the separation theorems for some classes of sets in topological spaces of weight $\tau$ %J Doklady Akademii Nauk %D 1969 %P 266-269 %V 187 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1969_187_2_a8/ %G ru %F DAN_1969_187_2_a8