References [1] Albert, M. H. and Atkinson, M. D., Simple permutations and pattern restricted permutations, Discrete Mathematics, 300, 1--3 (2005), 1 -- 15, (()). [2] Albert, M. H., Atkinson, M. D. and Ru\v{s}kuc, N., Regular closed sets of permutations, Theoretical Computer Science, 306 (2003), 85 - 100. [3] Atkinson, M. D., Livesey, M. J. and Tulley, D., Permutations generated by token passing in graphs, Theoretical Computer Science, 178 (n.d.), 103 - 118. [4] Brignall, R., A Survey of Simple Permutations, ArXiv e-prints (2008). [5] Claesson, A., Jel{\'{i}}nek, V. and Steingr{\'{i}}msson, E., Upper bounds for the Stanley-Wilf limit of 1324 and other layered patterns, ArXiv e-prints (2011). [6] Hoffmann, R. and Linton, S., Regular Languages of Plus- and Minus- (In)Decomposable Permutations, Pure Mathematics and Applications (to appear) (2013). [7] Pierrot, A. and Rossin, D., Simple permutations poset, ArXiv e-prints (2012), 1--15. [8] Uno, T. and Yagiura, M., Fast Algorithms to Enumerate All Common Intervals of Two Permutations, Algorithmica, 26 (2000), 2000.