@article{JAC_2001__13_2_a6,
     author = {Billey, Sara C. and Warrington, Gregory S.},
     title = {Kazhdan-Lusztig polynomials for 321-hexagon-avoiding permutations},
     journal = {Journal of Algebraic Combinatorics},
     pages = {111--136},
     publisher = {mathdoc},
     volume = {13},
     number = {2},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_2001__13_2_a6/}
}