%0 Journal Article %A Ewa Duma %T Algebraic SL(2)-actions: deformations of infinite isotropy subgroups %J Colloquium Mathematicum %D 1989 %P 221-231 %V 58 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-58-2-221-231/ %R 10.4064/cm-58-2-221-231 %G en %F 10_4064_cm_58_2_221_231