HOFFMANN-JORGENSEN, J. Measures which agree on balls. Mathematica Scandinavica, Berkeley, CA, United States, v. 37, p. 319–326, 1975. DOI: 10.7146/math.scand.a-11610. Disponível em: https://journals.msp.org/mscand/article/view/2061. Acesso em: 25 jul. 2026.