@article{10_37236_1691,
     author = {Mireille Bousquet-M\'elou},
     title = {Four classes of pattern-avoiding permutations under one roof: {Generating} trees with two labels},
     journal = {The electronic journal of combinatorics},
     year = {2002},
     volume = {9},
     number = {2},
     doi = {10.37236/1691},
     zbl = {1031.05006},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1691/}
}