TY - JOUR AU - A. V. Vasilieva TI - Asymptotic methods in the theory of ordinary differential equations containing small parameters in front of the higher derivatives JO - Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki PY - 1963 SP - 611 EP - 642 VL - 3 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ZVMMF_1963_3_4_a0/ LA - ru ID - ZVMMF_1963_3_4_a0 ER -