TY - JOUR AU - Yu. P. Boglaev TI - On the theory of singularly perturbed problems with branch points for degenerate equations JO - Differencialʹnye uravneniâ PY - 1972 SP - 762 EP - 766 VL - 8 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1972_8_5_a1/ LA - ru ID - DE_1972_8_5_a1 ER -