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@article{JRAM_1993__445_153575, author = {B. Buffoni and L. Jeanjean}, title = {Bifurcation from the spectrum towards regular values.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {1--30}, publisher = {mathdoc}, volume = {445}, year = {1993}, zbl = {0795.47041}, url = {http://geodesic.mathdoc.fr/item/JRAM_1993__445_153575/} }
B. Buffoni; L. Jeanjean. Bifurcation from the spectrum towards regular values.. Journal für die reine und angewandte Mathematik, Tome 445 (1993), pp. 1-30. http://geodesic.mathdoc.fr/item/JRAM_1993__445_153575/