Ira M. Gessel. A Factorization for Formal Laurent Series and Lattice Path Enumeration. Journal of Combinatorial Theory, Series A, 28(3):321-337, 1980.
@article{Gessel80,
title = {A Factorization for Formal Laurent Series and Lattice Path Enumeration},
author = {Ira M. Gessel},
year = {1980},
researchr = {https://researchr.org/publication/Gessel80},
cites = {0},
citedby = {0},
journal = {Journal of Combinatorial Theory, Series A},
volume = {28},
number = {3},
pages = {321-337},
}