%0 Journal Article %A Renato Guzzardi %T Non-linear eigenvalue problems and bifurcations for differentiable multivalued maps %J Annales Polonici Mathematici %D 1985 %P 283-295 %V 45 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-45-3-283-295/ %R 10.4064/ap-45-3-283-295 %G en %F 10_4064_ap_45_3_283_295