@article{GDZPPN002109786,
title = {An algorithmic proof theory for hypergeometric (ordinary and "q") multisum/integral indentities.},
journal = {Inventiones mathematicae},
volume = {110},
year = {1992},
pages = {575-634},
zbl = {0739.05007},
url = {http://dml.mathdoc.fr/item/GDZPPN002109786}
}
Wilf, Herbert S.; Zeilberger, Doron. An algorithmic proof theory for hypergeometric (ordinary and "q") multisum/integral indentities.. Inventiones mathematicae, Tome 110 (1992) pp. 575-634. http://gdmltest.u-ga.fr/item/GDZPPN002109786/