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@article{IM2_1971_5_2_a8, author = {V. S. Klimov}, title = {Nontrivial solutions of boundary value problems for semilinear elliptic equations}, journal = {Izvestiya. Mathematics }, pages = {445--457}, publisher = {mathdoc}, volume = {5}, number = {2}, year = {1971}, language = {en}, url = {http://geodesic.mathdoc.fr/item/IM2_1971_5_2_a8/} }
V. S. Klimov. Nontrivial solutions of boundary value problems for semilinear elliptic equations. Izvestiya. Mathematics , Tome 5 (1971) no. 2, pp. 445-457. http://geodesic.mathdoc.fr/item/IM2_1971_5_2_a8/