خضر محمد ح. The effect of cooperative learning in lessening aggressive behavior and developing some basic skills for fifth primary class pupils. College of Basic Education Research Journal, [S. l.], v. 5, n. 4, p. 130–159, 2007. Disponível em: https://stats.uomosul.edu.iq/index.php/berj/article/view/39880. Acesso em: 26 oct. 2025.