SINGH, H. P.; VISHWAKARMA, G. K. Modified Exponential Ratio and Product Estimators for Finite Population Mean in Double Sampling. Austrian Journal of Statistics, [S. l.], v. 36, n. 3, p. 217–225, 2016. DOI: 10.17713/ajs.v36i3.333. Disponível em: https://www.ajs.or.at/index.php/ajs/article/view/vol36%2C%20no3%20-%205. Acesso em: 14 oct. 2025.