@article{JIS_2007__10_6_a6,
     author = {Bernini, Antonio and Pergola, Elisa},
     title = {Enumerating permutations avoiding more than three {Babson-Steingr{\'\i}msson} patterns},
     journal = {Journal of integer sequences},
     publisher = {mathdoc},
     volume = {10},
     number = {6},
     year = {2007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2007__10_6_a6/}
}