%0 Journal Article %A Z. M. Zainulabidova %T A boundary value problem for equations whose order degenerates along the perpendicular lines of change of type %J Differencialʹnye uravneniâ %D 2004 %P 1374-1378 %V 40 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2004_40_10_a9/ %G ru %F DE_2004_40_10_a9