RIZVI, Syed Ejaz Husain; GUPTA, Jaj P.; BHARGAVA, Manoj. Effect of optimum stratification on sampling with varying probabilities under proportional allocation. Statistica, [S. l.], v. 64, n. 4, p. 721–733, 2004. DOI: 10.6092/issn.1973-2201/68. Disponível em: https://rivista-statistica.unibo.it/article/view/68. Acesso em: 25 dec. 2024.