@article{IM_1973__20_142207,
     author = {R.M. Switzer},
     title = {Homology {Comodules.}},
     journal = {Inventiones mathematicae},
     pages = {97--102},
     publisher = {mathdoc},
     volume = {20},
     year = {1973},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM_1973__20_142207/}
}