@article{10_37236_1344,
     author = {M. D. Atkinson},
     title = {Permutations which are the union of an increasing and a decreasing subsequence},
     journal = {The electronic journal of combinatorics},
     year = {1998},
     volume = {5},
     doi = {10.37236/1344},
     zbl = {0885.05011},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1344/}
}