TOUTENBURG, H.; SRIVASTAVA, V. K. Efficient estimation of population mean using incomplete survey data on study and auxiliary characteristics. Statistica, [S. l.], v. 63, n. 2, p. 223–236, 2003. DOI: 10.6092/issn.1973-2201/350. Disponível em: https://rivista-statistica.unibo.it/article/view/350. Acesso em: 22 oct. 2021.