@article{10_37236_4125,
     author = {Paul R.G. Mortimer and Thomas Prellberg},
     title = {On the number of walks in a triangular domain},
     journal = {The electronic journal of combinatorics},
     year = {2015},
     volume = {22},
     number = {1},
     doi = {10.37236/4125},
     zbl = {1308.05010},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/4125/}
}