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@article{MM2_1995__86_3_156034, author = {Xianqing Li-Jost}, title = {Bifurcation near solutions of variational problems with degenerate second variation.}, journal = {Manuscripta mathematica}, pages = {1--14}, publisher = {mathdoc}, volume = {86}, number = {3}, year = {1995}, zbl = {0816.58011}, url = {http://geodesic.mathdoc.fr/item/MM2_1995__86_3_156034/} }
Xianqing Li-Jost. Bifurcation near solutions of variational problems with degenerate second variation.. Manuscripta mathematica, Tome 86 (1995) no. 3, pp. 1-14. http://geodesic.mathdoc.fr/item/MM2_1995__86_3_156034/