@article{10_37236_1070,
     author = {Peter Keevash and Po-Shen Loh and Benny Sudakov},
     title = {Bounding the number of edges in permutation graphs},
     journal = {The electronic journal of combinatorics},
     year = {2006},
     volume = {13},
     doi = {10.37236/1070},
     zbl = {1098.05042},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1070/}
}