@article{10_37236_713,
     author = {Paul Duncan and Einar Steingr{\'\i}msson},
     title = {Pattern avoidance in ascent sequences},
     journal = {The electronic journal of combinatorics},
     year = {2011},
     volume = {18},
     number = {1},
     doi = {10.37236/713},
     zbl = {1243.05010},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/713/}
}