IBRAHEEM, O.; JASIM MOHAMMED, M. Use the robust RFCH method with a polychoric correlation matrix in structural equation modeling When you are ordinal data. IRAQI JOURNAL OF STATISTICAL SCIENCES, [S. l.], v. 19, n. 2, p. 24–35, 2022. DOI: 10.33899/iqjoss.2022.0176201. Disponível em: https://tanmiyat.uomosul.edu.iq/index.php/stats/article/view/29341. Acesso em: 6 sep. 2025.