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@article{MZM_1969_5_2_a12, author = {M. A. Krasnosel'skii and Yu. V. Pokornyi}, title = {Non-zero solutions of equations with strong nonlinearities}, journal = {Matemati\v{c}eskie zametki}, pages = {253--260}, publisher = {mathdoc}, volume = {5}, number = {2}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1969_5_2_a12/} }
M. A. Krasnosel'skii; Yu. V. Pokornyi. Non-zero solutions of equations with strong nonlinearities. Matematičeskie zametki, Tome 5 (1969) no. 2, pp. 253-260. http://geodesic.mathdoc.fr/item/MZM_1969_5_2_a12/