BALSER, Werner. Summation of Formal Power Series Through Iterated Laplace Integrals. Mathematica Scandinavica, Berkeley, CA, United States, v. 70, p. 161–171, 1992. DOI: 10.7146/math.scand.a-12392. Disponível em: https://journals.msp.org/mscand/article/view/1260. Acesso em: 24 jul. 2026.