@article{10_4153_CMB_2008_010_3,
     author = {Kassel, Christian},
     title = {Homotopy {Formulas} for {Cyclic} {Groups} {Acting} on {Rings}},
     journal = {Canadian mathematical bulletin},
     pages = {81--85},
     year = {2008},
     volume = {51},
     number = {1},
     doi = {10.4153/CMB-2008-010-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2008-010-3/}
}