Ira M. Gessel. Finding Identities with the WZ Method. Journal of Symbolic Computation, 20(5/6):537-566, 1995.
@article{Gessel95:0, title = {Finding Identities with the WZ Method}, author = {Ira M. Gessel}, year = {1995}, researchr = {https://researchr.org/publication/Gessel95%3A0}, cites = {0}, citedby = {0}, journal = {Journal of Symbolic Computation}, volume = {20}, number = {5/6}, pages = {537-566}, }