TY - JOUR AU - M. M. Vainberg TI - On some principles in the theory of nonlinear equations JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1960 VL - 15 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RM_1960_15_1_a24/ LA - ru ID - RM_1960_15_1_a24 ER -