%0 Journal Article %A M. V. Talalaev %T Classes of differential forms that are invariant under quasiconformal mappings %J Matematičeskie trudy %D 1987 %P 149-151 %V 9 %I mathdoc %U http://geodesic.mathdoc.fr/item/MT_1987_9_a11/ %G ru %F MT_1987_9_a11