@article{10_37236_1548,
     author = {Richard Anstee and Ron Ferguson and Attila Sali},
     title = {Small forbidden configurations. {II}},
     journal = {The electronic journal of combinatorics},
     year = {2001},
     volume = {8},
     number = {1},
     doi = {10.37236/1548},
     zbl = {0960.05100},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1548/}
}