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@article{IM_1975__29_142327, author = {Kenneth S. Brown}, title = {Euler {Characteristics} of {Groups:} {The} {p-Fractional} {Part.}}, journal = {Inventiones mathematicae}, pages = {1--6}, publisher = {mathdoc}, volume = {29}, year = {1975}, zbl = {0294.20048}, url = {http://geodesic.mathdoc.fr/item/IM_1975__29_142327/} }
Kenneth S. Brown. Euler Characteristics of Groups: The p-Fractional Part.. Inventiones mathematicae, Tome 29 (1975), pp. 1-6. http://geodesic.mathdoc.fr/item/IM_1975__29_142327/