STROMBERG, Karl. A Note on the Convolution of Regular Measures. Mathematica Scandinavica, Berkeley, CA, United States, v. 7, p. 347–352, 1959. DOI: 10.7146/math.scand.a-10580. Disponível em: https://journals.msp.org/mscand/article/view/2766. Acesso em: 8 sep. 2026.