عبد العزيز أحمد ر. Estimators for a Finite Population Variance and sample size in Stratified Random Sampling (SRS). IRAQI JOURNAL OF STATISTICAL SCIENCES, [S. l.], v. 7, n. 2, p. 229–244, 2007. DOI: 10.33899/iqjoss.2007.032414. Disponível em: https://ojs.uomosul.edu.iq/index.php/stats/article/view/28999. Acesso em: 17 sep. 2025.