KARLSSON, Per W. Some Hypergeometric Transformations and Generating Functions. Mathematica Scandinavica, Berkeley, CA, United States, v. 33, p. 193–204, 1973. DOI: 10.7146/math.scand.a-11483. Disponível em: https://journals.msp.org/mscand/article/view/2186. Acesso em: 25 jul. 2026.