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@article{DAN_1971_201_5_a8, author = {Jindrich Ne\v{c}as}, title = {On the discreteness of the spectrum of a nonlinear {Sturm--Liouville} equation}, journal = {Doklady Akademii Nauk}, pages = {1045--1048}, publisher = {mathdoc}, volume = {201}, number = {5}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1971_201_5_a8/} }
Jindrich Nečas. On the discreteness of the spectrum of a nonlinear Sturm--Liouville equation. Doklady Akademii Nauk, Tome 201 (1971) no. 5, pp. 1045-1048. http://geodesic.mathdoc.fr/item/DAN_1971_201_5_a8/