FJELDSTAD, Jonas Ekman. A generalization of Dixon’s formula. Mathematica Scandinavica, Berkeley, CA, United States, v. 2, p. 46–48, 1954. DOI: 10.7146/math.scand.a-10393. Disponível em: https://journals.msp.org/mscand/article/view/2933. Acesso em: 8 sep. 2026.