PREISS, D.; TISER, J. Positivity principle for more concentrated measures. MATHEMATICA SCANDINAVICA, [S. l.], v. 81, p. 236–246, 1997. DOI: 10.7146/math.scand.a-12877. Disponível em: https://www.mscand.dk/article/view/12877. Acesso em: 14 apr. 2025.