@article{10_4007_annals_2003_158_929,
     author = {Daniel K. Biss},
     title = {The homotopy type of the matroid grassmannian},
     journal = {Annals of mathematics},
     pages = {929--952},
     publisher = {mathdoc},
     volume = {158},
     number = {3},
     year = {2003},
     doi = {10.4007/annals.2003.158.929},
     mrnumber = {2031856},
     zbl = {1076.52006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4007/annals.2003.158.929/}
}