TY - JOUR AU - A. I. Vahabov TI - On the question of completeness of the system of eigenfunctions of a nonregular ordinary differential pencil JO - Doklady Akademii Nauk PY - 1981 SP - 15 EP - 18 VL - 257 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1981_257_1_a1/ LA - ru ID - DAN_1981_257_1_a1 ER -