@article{10_37236_4571,
     author = {Murray Elder and Geoffrey Lee and Andrew Rechnitzer},
     title = {Permutations generated by a depth 2 stack and an infinite stack in series are algebraic},
     journal = {The electronic journal of combinatorics},
     year = {2015},
     volume = {22},
     number = {2},
     doi = {10.37236/4571},
     zbl = {1311.05005},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/4571/}
}