%0 Journal Article %A A. P. Chernyaev %T Linear steady filtration in a vertically inhomogeneous stratum %J Doklady Akademii Nauk %D 1990 %P 306-310 %V 312 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1990_312_2_a10/ %G ru %F DAN_1990_312_2_a10