TY - JOUR AU - A. A. Abramov TI - On the behaviour of boundary conditions moved to the neighborhood of a regular singular point JO - Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki PY - 1980 SP - 901 EP - 908 VL - 20 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ZVMMF_1980_20_4_a8/ LA - ru ID - ZVMMF_1980_20_4_a8 ER -