TY - JOUR AU - V. P. Serebryakov TI - The number of solutions in the space $L_2$ of a nonselfadjoint system of second-order differential equations JO - Vestnik Moskovskogo universiteta. Matematika, mehanika PY - 1988 SP - 3 EP - 8 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VMUMM_1988_2_a0/ LA - ru ID - VMUMM_1988_2_a0 ER -