ERDÖS, P.; NEVEU, J.; RENYI, A. An Elementary Inequality Between the Probabilities of Events. Mathematica Scandinavica, Berkeley, CA, United States, v. 13, p. 99–104, 1963. DOI: 10.7146/math.scand.a-10692. Disponível em: https://journals.msp.org/mscand/article/view/2631. Acesso em: 25 jul. 2026.