@article{GDZPPN002417898,
title = {Nonlinear Eigenvalue Problems Having Precisely Two Solutions.},
journal = {Mathematische Zeitschrift},
volume = {147},
year = {1976},
pages = {27-38},
zbl = {0329.35027},
url = {http://dml.mathdoc.fr/item/GDZPPN002417898}
}
Amann, Herbert. Nonlinear Eigenvalue Problems Having Precisely Two Solutions.. Mathematische Zeitschrift, Tome 147 (1976) pp. 27-38. http://gdmltest.u-ga.fr/item/GDZPPN002417898/