%0 Journal Article %A A. P. Oskolkov %T On certain classes of non-uniformly elliptic quasilinear equations %J Zapiski Nauchnykh Seminarov POMI %D 1969 %P 156-172 %V 14 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1969_14_a7/ %G ru %F ZNSL_1969_14_a7