%0 Journal Article %A Frank Morgan %T Calibrations and the size of Grassmann faces. %J Aequationes mathematicae %D 1992 %P 1-13 %V 43 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/AM2_1992__43_1_137438/ %F AM2_1992__43_1_137438