%0 Journal Article %A B. Rzepecki %T Some properties of the set of solutions of an operator equation in a Banach space %J Commentationes Mathematicae %D 1978 %P 467-478 %V 20 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.14708/cm.v20i2.5920/ %R 10.14708/cm.v20i2.5920 %G pl %F 10_14708_cm_v20i2_5920