%0 Journal Article %A S. K. Vodop'yanov %A V. M. Gol'dstein %A Yu. G. Reshetnyak %T On~geometric properties of~functions with generalized first derivatives %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1979 %P 19-74 %V 34 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1979_34_1_a1/ %G en %F RM_1979_34_1_a1