%0 Journal Article %A T. S. Pigolkina %T On the theory of weight classes %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1969 %P 201-212 %V 105 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_1969_105_a11/ %G ru %F TM_1969_105_a11