@article{02161264,
title = {Tight quotients and double quotients in the Bruhat order.},
journal = {The Electronic Journal of Combinatorics [electronic only]},
volume = {11},
year = {2004},
zbl = {1067.20053},
language = {en},
url = {http://dml.mathdoc.fr/item/02161264}
}
Stembridge, John R. Tight quotients and double quotients in the Bruhat order.. The Electronic Journal of Combinatorics [electronic only], Tome 11 (2004) . http://gdmltest.u-ga.fr/item/02161264/