@article{05847724, title = {Critical point theorems and Ekeland type variational principle with applications.}, journal = {Fixed Point Theory and Applications [electronic only]}, volume = {2011}, year = {2011}, doi = {10.1155/2011/914624}, zbl = {1213.49015}, language = {en}, url = {http://dml.mathdoc.fr/item/05847724} }
Lin, Lai-Jiu; Wang, Sung-Yu; Ansari, Qamrul Hasan. Critical point theorems and Ekeland type variational principle with applications.. Fixed Point Theory and Applications [electronic only], Tome 2011 (2011) . doi : 10.1155/2011/914624. http://gdmltest.u-ga.fr/item/05847724/