%0 Journal Article %A S. Rolewicz %T On orbits of elements %J Studia Mathematica %D 1969 %P 17-22 %V 32 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4064/sm-32-1-17-22/ %R 10.4064/sm-32-1-17-22 %G fr %F 10_4064_sm_32_1_17_22