%0 Journal Article %A S. N. Antontsev %A A. A. Papin %T Approximation methods of solving problems of two-phase filtration %J Doklady Akademii Nauk %D 1979 %P 521-525 %V 247 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1979_247_3_a0/ %G ru %F DAN_1979_247_3_a0