@article{JAC_2016__43_1_a0,
     author = {Howlett, Robert B. and Nguyen, Van Minh},
     title = {$W$-graph ideals and biideals},
     journal = {Journal of Algebraic Combinatorics},
     pages = {237--275},
     publisher = {mathdoc},
     volume = {43},
     number = {1},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_2016__43_1_a0/}
}