KARLSSON, Per W. Some Reduction Formulas for Hypergeometric Functions. MATHEMATICA SCANDINAVICA, [S. l.], v. 31, p. 248–256, 1972. DOI: 10.7146/math.scand.a-11431. Disponível em: https://tidsskrift.dk/math/article/view/11431. Acesso em: 14 aug. 2026.