%0 Journal Article %A Kassel, Christian %T Homotopy Formulas for Cyclic Groups Acting on Rings %J Canadian mathematical bulletin %D 2008 %P 81-85 %V 51 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-2008-010-3/ %R 10.4153/CMB-2008-010-3 %F 10_4153_CMB_2008_010_3