%0 Journal Article %A Peter Hess %T Nonlinear Functional Equations and Eigenvalue Problems in Nonseperable Banach Spaces %J Commentarii mathematici Helvetici %D 1971 %P 314 %V 46 %I mathdoc %U https://geodesic-test.mathdoc.fr/item/CMH_1971__46_139480/ %G un %F CMH_1971__46_139480