@article{10_4007_annals_2009_170_799,
     author = {Anders Bj\"orner  and Torsten Ekedahl},
     title = {On the shape of {Bruhat} intervals},
     journal = {Annals of mathematics},
     pages = {799--817},
     publisher = {mathdoc},
     volume = {170},
     number = {2},
     year = {2009},
     doi = {10.4007/annals.2009.170.799},
     mrnumber = {2552108},
     zbl = {1226.05268},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4007/annals.2009.170.799/}
}