@article{IM_1977__39_142465,
     author = {V.V. Deodhar},
     title = {Some {Characterizations} of {Bruhat} {Ordering} on a {Coxeter} {Group} and {Determination} of the {Relative} {M\"obius} {Function}},
     journal = {Inventiones mathematicae},
     pages = {187--198},
     publisher = {mathdoc},
     volume = {39},
     year = {1977},
     zbl = {0333.20041},
     url = {http://geodesic.mathdoc.fr/item/IM_1977__39_142465/}
}