SINGH, H. P.; TAILOR, R.; TAILOR, R. Estimation of finite population mean in two-phase sampling with known coefficient of variation of an auxiliary character. Statistica, [S. l.], v. 72, n. 1, p. 111–126, 2012. DOI: 10.6092/issn.1973-2201/3637. Disponível em: https://rivista-statistica.unibo.it/article/view/3637. Acesso em: 4 feb. 2023.