AL-JARARHA, J.; AL-HAJ EBRAHEM, M. A Ratio Estimator Under General Sampling Design. Austrian Journal of Statistics, [S. l.], v. 41, n. 2, p. 105–115, 2016. DOI: 10.17713/ajs.v41i2.178. Disponível em: https://www.ajs.or.at/index.php/ajs/article/view/vol41%2C%20no2%20-%202. Acesso em: 13 oct. 2025.