TY - JOUR AU - Yu. F. Korobeinik TI - Differential equations of infinite order and infinite systems of JO - Izvestiya. Mathematics PY - 1970 SP - 891 EP - 930 VL - 4 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IM2_1970_4_4_a9/ LA - en ID - IM2_1970_4_4_a9 ER -