عمر عولا س. The Compartive Study for Status Competition Anxiety Knowlement, Physiologic Self Valance) Between Different Game Lines for Football. College of Basic Education Research Journal, [S. l.], v. 6, n. 4, p. 232–243, 2007. Disponível em: https://stats.uomosul.edu.iq/index.php/berj/article/view/39630. Acesso em: 26 oct. 2025.