Simultaneous Estimation of Adjusted Rate of Two Factors using Method of Direct Standardization. Global Journal of Science Frontier Research, [S. l.], v. 15, n. 32, p. 37–42, 2015. Disponível em: https://journalofscience.org/index.php/GJSFR/article/view/. Acesso em: 23 oct. 2026.