Ira M. Gessel. Super Ballot Numbers. Journal of Symbolic Computation, 14(2/3):179-194, 1992.
@article{Gessel92:0,
title = {Super Ballot Numbers},
author = {Ira M. Gessel},
year = {1992},
researchr = {https://researchr.org/publication/Gessel92%3A0},
cites = {0},
citedby = {0},
journal = {Journal of Symbolic Computation},
volume = {14},
number = {2/3},
pages = {179-194},
}