%0 Journal Article %A Andrzej Tyc %T Actions of Hopf algebras on pro-semisimple noetherian algebras and their invariants %J Colloquium Mathematicum %D 2001 %P 39-55 %V 88 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm88-1-5/ %R 10.4064/cm88-1-5 %G en %F 10_4064_cm88_1_5