@article{GDZPPN002427516, title = {On Positive Solutions of -...u = F(x, u).}, journal = {Mathematische Zeitschrift}, volume = {183}, year = {1983}, pages = {351-358}, zbl = {0491.35048}, url = {http://dml.mathdoc.fr/item/GDZPPN002427516} }
Toland, John F. On Positive Solutions of -...u = F(x, u).. Mathematische Zeitschrift, Tome 183 (1983) pp. 351-358. http://gdmltest.u-ga.fr/item/GDZPPN002427516/