%0 Journal Article %A Takahashi, Wataru %T Fixed Point Theorem and Nonlinear Ergodic Theorem for Nonexpansive Semigroups Without Convexity %J Canadian journal of mathematics %D 1992 %P 880-887 %V 44 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1992-053-3/ %R 10.4153/CJM-1992-053-3 %F 10_4153_CJM_1992_053_3