TY - JOUR AU - I. D. Avrech TI - Estimates of derivatives with respect to the parameter of the resolvent of a second order differential operator JO - Differencialʹnye uravneniâ PY - 1978 SP - 719 EP - 723 VL - 14 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1978_14_4_a15/ LA - ru ID - DE_1978_14_4_a15 ER -