%0 Journal Article %A Dang Ang %A Le Hoa %T On a fixed point theorem of Krasnoselskii and triangle contractive operators %J Fundamenta Mathematicae %D 1984 %P 77-98 %V 120 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-120-1-77-98/ %R 10.4064/fm-120-1-77-98 %G en %F 10_4064_fm_120_1_77_98