MARTÍNEZ JAIME, Oscar Alejandro; DÍAZ GARCÍA, José Antonio. Heteroscedasticity in a two-factors design model. Acta Universitaria, [S. l.], v. 23, n. 3, p. 14–19, 2013. DOI: 10.15174/au.2013.453. Disponível em: https://www.actauniversitaria.ugto.mx/index.php/acta/article/view/453. Acesso em: 8 may. 2026.