%0 Journal Article %A Jan Jaworowski %T An Equivariant Extension Theorem and G-Retracts with a Finite Structure. %J Manuscripta mathematica %D 1981 %P 323-330 %V 35 %I mathdoc %U http://geodesic.mathdoc.fr/item/MM2_1981__35_154798/ %F MM2_1981__35_154798