TY - JOUR AU - S. A. Abdo AU - N. J. Yurchuk TI - Multipoint boundary value problems for certain operator-differential equations. I. A priori estimates JO - Differencialʹnye uravneniâ PY - 1985 SP - 417 EP - 425 VL - 21 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1985_21_3_a7/ LA - ru ID - DE_1985_21_3_a7 ER -