%0 Journal Article
%A I. B. Badriev
%A M. M. Karchevskii
%T Application of the duality method to the solution of nonlinear problems of filtration theory with a limit gradient
%J Differencialʹnye uravneniâ
%D 1982
%P 1133-1144
%V 18
%N 7
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1982_18_7_a3/
%G ru
%F DE_1982_18_7_a3