MURTADA, R.; ریاض; ISMAEEL ALSEFO, F.; فرید. The effect of the basic variables on the movement of railway transport and Processed using ridge regression approach. Journal of Education and Science (JES), [S. l.], v. 22, n. 3, p. 162–174, 2009. DOI: 10.33899/edusj.2009.57769. Disponível em: https://rjps.uomosul.edu.iq/index.php/edusj/article/view/18192. Acesso em: 4 aug. 2025.