@article{MMO_1954_3_a8,
     author = {M. M. Vainberg},
     title = {The variational theory of the eigenfunctions of nonlinear integral and other operators},
     journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva},
     pages = {375--406},
     publisher = {mathdoc},
     volume = {3},
     year = {1954},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MMO_1954_3_a8/}
}