Donatella Merlini, Douglas G. Rogers, Renzo Sprugnoli, M. Cecilia Verri. Underdiagonal Lattice Paths with Unrestricted Steps. Discrete Applied Mathematics, 91(1-3):197-213, 1999. [doi]
@article{MerliniRSV99,
title = {Underdiagonal Lattice Paths with Unrestricted Steps},
author = {Donatella Merlini and Douglas G. Rogers and Renzo Sprugnoli and M. Cecilia Verri},
year = {1999},
doi = {10.1016/S0166-218X(98)00126-7},
url = {http://dx.doi.org/10.1016/S0166-218X(98)00126-7},
researchr = {https://researchr.org/publication/MerliniRSV99},
cites = {0},
citedby = {0},
journal = {Discrete Applied Mathematics},
volume = {91},
number = {1-3},
pages = {197-213},
}