M AL-KAASAB, M.; AL-EMAT, A. On The Effect of Stratification When Two Independent Stratifying Variables Are Used. IRAQI JOURNAL OF STATISTICAL SCIENCES, [S. l.], v. 13, n. 3, p. 133–149, 2025. Disponível em: https://rjps.uomosul.edu.iq/index.php/stats/article/view/20878. Acesso em: 3 aug. 2025.