%0 Journal Article %A M. A. Abdrachmanov %T $L_2$-estimates of the solution of model initial-boundary value problems for a system of two equations of general form with mixed parabolic-elliptic structure %J Differencialʹnye uravneniâ %D 1990 %P 1634-1635 %V 26 %N 9 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1990_26_9_a20/ %G ru %F DE_1990_26_9_a20