%0 Journal Article %A M. Altman %T Directional contractors and equations in Banach spaces %J Studia Mathematica %D 1973 %P 101-110 %V 46 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-46-2-101-110/ %R 10.4064/sm-46-2-101-110 %G en %F 10_4064_sm_46_2_101_110