%0 Journal Article %A K. S. Fayazov %A Ya. K. Khudayberganov %T An ill-posed boundary value problem for a mixed type second-order differential equation with two degenerate lines %J Matematičeskie zametki SVFU %D 2023 %P 51-62 %V 30 %N 1 %U http://geodesic.mathdoc.fr/item/SVFU_2023_30_1_a3/ %G ru %F SVFU_2023_30_1_a3