TY - JOUR AU - K. S. Fayazov AU - Ya. K. Khudayberganov TI - An ill-posed boundary value problem for a mixed type second-order differential equation with two degenerate lines JO - Matematičeskie zametki SVFU PY - 2023 SP - 51 EP - 62 VL - 30 IS - 1 UR - http://geodesic.mathdoc.fr/item/SVFU_2023_30_1_a3/ LA - ru ID - SVFU_2023_30_1_a3 ER -