@article{01587337, title = {On multiple positive solutions of positone and non-positone problems.}, journal = {Abstract and Applied Analysis}, volume = {4}, year = {1999}, pages = {101-108}, doi = {10.1155/S1085337599000044}, zbl = {0970.35049}, language = {en}, url = {http://dml.mathdoc.fr/item/01587337} }
Corrêa, F.J.S.A. On multiple positive solutions of positone and non-positone problems.. Abstract and Applied Analysis, Tome 4 (1999) pp. 101-108. doi : 10.1155/S1085337599000044. http://gdmltest.u-ga.fr/item/01587337/