%0 Journal Article %A I. D. Mayergoyz %T Estimates of the gradient of the solution of an elliptic equation on the boundary of the domain %J Doklady Akademii Nauk %D 1973 %P 291-294 %V 212 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1973_212_2_a5/ %G ru %F DAN_1973_212_2_a5