SWAIN, A. K. P. C. A study of some estimators in Midzuno scheme of sampling in surveys for multiple characteristics. Statistica, [S. l.], v. 45, n. 4, p. 555–559, 1985. DOI: 10.6092/issn.1973-2201/698. Disponível em: https://rivista-statistica.unibo.it/article/view/698. Acesso em: 5 may. 2024.