%0 Journal Article %A Yichao Tian %T Canonical subgroups of Barsotti-Tate groups %J Annals of mathematics %D 2010 %P 955-988 %V 172 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4007/annals.2010.172.955/ %R 10.4007/annals.2010.172.955 %G en %F 10_4007_annals_2010_172_955