%0 Journal Article %A A. V. Borodin %T A certain estimate for elliptic equations and its application to loaded equations %J Differencialʹnye uravneniâ %D 1977 %P 17-22 %V 13 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1977_13_1_a2/ %G ru %F DE_1977_13_1_a2