Exponential Chain Ratio and Product type Estimators for Finite Population Mean under Double Sampling Scheme. Global Journal of Science Frontier Research, [S. l.], v. 12, n. F6, p. 13–24, 2012. Disponível em: https://www.journalofscience.org/index.php/GJSFR/article/view/100315. Acesso em: 6 feb. 2026.