%0 Journal Article %A W. Roter %T On conformal collineations %J Colloquium Mathematicum %D 1989 %P 279-294 %V 57 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-57-2-279-294/ %R 10.4064/cm-57-2-279-294 %G en %F 10_4064_cm_57_2_279_294