راكان قاسم عبد الله غ. The effect of using tow strategies of the cooperative learning in mathematics in the achievement and self-confidence of the second-stage intermediate students. College of Basic Education Research Journal, [S. l.], v. 5, n. 2, p. 116–141, 2007. Disponível em: https://stats.uomosul.edu.iq/index.php/berj/article/view/39559. Acesso em: 26 oct. 2025.