TAILOR, R.; CHOUHAN, S.; TAILOR, R.; GARG, N. A ratio-cum-product estimator of population mean in stratified random sampling using two auxiliary variables. Statistica, [S. l.], v. 72, n. 3, p. 287–297, 2012. DOI: 10.6092/issn.1973-2201/3648. Disponível em: https://rivista-statistica.unibo.it/article/view/3648. Acesso em: 27 jan. 2023.