%0 Journal Article %A Brion, Michel %T Commutative Algebraic Groups up to Isogeny %J Documenta mathematica %D 2017 %P 679-725 %V 22 %I mathdoc %U http://geodesic.mathdoc.fr/item/DOCMA_2017__22__a33/ %G en %F DOCMA_2017__22__a33