IBRAHEEM, O.; عمر; JASIM MOHAMMED, M.; محمد. 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, 2025. Disponível em: https://rjps.uomosul.edu.iq/index.php/stats/article/view/20903. Acesso em: 6 aug. 2025.