%0 Journal Article %A Neumann, Jan %T An abstract differential equation and the potential bifurcation theorems by Krasnosel'skij %J Commentationes Mathematicae Universitatis Carolinae %D 1987 %P 261-276 %V 28 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_1987__28_2_a8/ %G en %F CMUC_1987__28_2_a8