RADSTRÖM, Hans. On the Iteration of analytic functions . Mathematica Scandinavica, Berkeley, CA, United States, v. 1, p. 85–92, 1953. DOI: 10.7146/math.scand.a-10367. Disponível em: https://journals.msp.org/mscand/article/view/2956. Acesso em: 25 jul. 2026.