TY - JOUR AU - Yu. N. Dnestrovskii AU - D. P. Kostomarov TI - Eigenvalue problems for second-order equations in the case of non-linear dependence on a parameter~$\lambda$ JO - Doklady Akademii Nauk PY - 1963 SP - 28 EP - 30 VL - 152 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1963_152_1_a5/ LA - ru ID - DAN_1963_152_1_a5 ER -