@article{05900733, title = {Bifurcation of gradient mappings possessing the Palais-Smale condition.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {2011}, year = {2011}, doi = {10.1155/2011/564930}, zbl = {1233.37028}, language = {en}, url = {http://dml.mathdoc.fr/item/05900733} }
Tonkes, Elliot. Bifurcation of gradient mappings possessing the Palais-Smale condition.. International Journal of Mathematics and Mathematical Sciences, Tome 2011 (2011) . doi : 10.1155/2011/564930. http://gdmltest.u-ga.fr/item/05900733/