@article{02163626, title = {On the existence of positive solutions for periodic parabolic sublinear problems.}, journal = {Abstract and Applied Analysis}, volume = {2003}, year = {2003}, pages = {975-984}, doi = {10.1155/S1085337503309029}, zbl = {1133.35380}, language = {en}, url = {http://dml.mathdoc.fr/item/02163626} }
Godoy, T.; Kaufmann, U. On the existence of positive solutions for periodic parabolic sublinear problems.. Abstract and Applied Analysis, Tome 2003 (2003) pp. 975-984. doi : 10.1155/S1085337503309029. http://gdmltest.u-ga.fr/item/02163626/