FRENNEMO, Lennart. Tauberian Problems for the $n$-Dimensional Laplace Transform II. Mathematica Scandinavica, Berkeley, CA, United States, v. 20, p. 225–239, 1967. DOI: 10.7146/math.scand.a-10832. Disponível em: https://journals.msp.org/mscand/article/view/2494. Acesso em: 25 jul. 2026.