TY - JOUR AU - V.V. Deodhar TI - Some Characterizations of Bruhat Ordering on a Coxeter Group and Determination of the Relative Möbius Function JO - Inventiones mathematicae PY - 1977 SP - 187 EP - 198 VL - 39 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IM_1977__39_142465/ ID - IM_1977__39_142465 ER -