@article{10_37236_1094,
     author = {Murray Elder},
     title = {Permutations generated by a stack of depth 2 and an infinite stack in series},
     journal = {The electronic journal of combinatorics},
     year = {2006},
     volume = {13},
     doi = {10.37236/1094},
     zbl = {1097.05002},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1094/}
}