%0 Journal Article %A Braden, Tom %T Perverse Sheaves on Grassmannians %J Canadian journal of mathematics %D 2002 %P 493-532 %V 54 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-2002-017-6/ %R 10.4153/CJM-2002-017-6 %F 10_4153_CJM_2002_017_6