%0 Journal Article %A I. Ya. Bakelman %T Geometric problems in quasilinear elliptic equations %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1970 %P 45-109 %V 25 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1970_25_3_a1/ %G en %F RM_1970_25_3_a1