@article{SLC_2012-2015_67_a3,
     author = {Henning \'Ulfarsson},
     title = {Describing {West-3-Stack-Sortable} {Permutations} with {Permutation} {Patterns}},
     journal = {S\'eminaire lotharingien de combinatoire},
     publisher = {mathdoc},
     volume = {67},
     year = {2012-2015},
     url = {http://geodesic.mathdoc.fr/item/SLC_2012-2015_67_a3/}
}