%0 Journal Article %A I. B. Badriev %A O. V. Pankratova %A R. R. Shagidullin %T Iterative methods for solving filtration problems with a discontinuous law with a limit gradient %J Differencialʹnye uravneniâ %D 1997 %P 396-399 %V 33 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1997_33_3_a16/ %G ru %F DE_1997_33_3_a16