%0 Journal Article %A Alexander Abian %T A Fundamental fixed point Theorem Revisited %J Ευκλείδης Γ %D 1989 %P 3-11 %V 21 %I mathdoc %U http://geodesic.mathdoc.fr/item/EUG_1989__21_a0/ %G gr %F EUG_1989__21_a0