Bruno Salvy, Paul Zimmermann. GFUN: a Maple package for the manipulation of generating and holonomic functions in one variable. ACM Transactions on Mathematical Software, 20(2):163-177, 1994. [doi]
@article{SalvyZ94,
title = {GFUN: a Maple package for the manipulation of generating and holonomic functions in one variable},
author = {Bruno Salvy and Paul Zimmermann},
year = {1994},
doi = {10.1145/178365.178368},
url = {http://doi.acm.org/10.1145/178365.178368},
researchr = {https://researchr.org/publication/SalvyZ94},
cites = {0},
citedby = {0},
journal = {ACM Transactions on Mathematical Software},
volume = {20},
number = {2},
pages = {163-177},
}