@article{10_37236_4000,
     author = {Brian Drake},
     title = {The weak order on pattern-avoiding permutations},
     journal = {The electronic journal of combinatorics},
     year = {2014},
     volume = {21},
     number = {3},
     doi = {10.37236/4000},
     zbl = {1300.05005},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/4000/}
}