%0 Journal Article %A N. M. Ivochkina %A A. P. Oskolkov %T Nonlocal estimates of the first derivatives of the solutions of the first boundary value problem for certain classes of nonuniformly elliptic and nonuniformly parabolic equations and systems %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1970 %P 65-101 %V 110 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_1970_110_a4/ %G ru %F TM_1970_110_a4