@article{10_37236_974,
     author = {Zvezdelina Stankova},
     title = {Shape-Wilf-ordering on permutations of length 3},
     journal = {The electronic journal of combinatorics},
     year = {2007},
     volume = {14},
     doi = {10.37236/974},
     zbl = {1158.05001},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/974/}
}