%0 Journal Article %A M. S. Salakhitdinov %A A. Tolipov %T Certain boundary value problems for a certain class of equations of mixed type %J Differencialʹnye uravneniâ %D 1973 %P 142-148 %V 9 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1973_9_1_a15/ %G ru %F DE_1973_9_1_a15