%0 Journal Article %A T. I. Lanina %T The strong solvability of a certain boundary value problem for an equation of mixed type with two parallel lines of degeneracy %J Differencialʹnye uravneniâ %D 1975 %P 100-107 %V 11 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1975_11_1_a11/ %G ru %F DE_1975_11_1_a11