HERZEL, A. Multivariate moments and products of moments: derivation of expectations and estimators from univariate formulae in simple random sampling. Statistica, [S. l.], v. 47, n. 1, p. 3–27, 1987. DOI: 10.6092/issn.1973-2201/728. Disponível em: https://rivista-statistica.unibo.it/article/view/728. Acesso em: 2 may. 2024.