@article{RM_1960_15_1_a24,
     author = {M. M. Vainberg},
     title = {On some principles in the theory of nonlinear equations},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1960_15_1_a24/}
}