%0 Journal Article %A Daniel K. Biss %T The homotopy type of the matroid grassmannian %J Annals of mathematics %D 2003 %P 929-952 %V 158 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4007/annals.2003.158.929/ %R 10.4007/annals.2003.158.929 %G en %F 10_4007_annals_2003_158_929