FRENNEMO, L. Tauberian Problems for the $n$-Dimensional Laplace Transform II. MATHEMATICA SCANDINAVICA, [S. l.], v. 20, p. 225–239, 1967. DOI: 10.7146/math.scand.a-10832. Disponível em: https://www.mscand.dk/article/view/10832. Acesso em: 2 may. 2024.