%0 Journal Article %A Ewa Duma %T On SL(2)-actions without 3-dimensional orbits %J Colloquium Mathematicum %D 1989 %P 233-241 %V 58 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-58-2-233-241/ %R 10.4064/cm-58-2-233-241 %G en %F 10_4064_cm_58_2_233_241