IBRAHEEM KHALEEL, K.; RASHED, A. The effect of Keller’s model is accompanied by direct mental training, focusing attention, and teaching volleyball skills to students. Al-Rafidain Journal For Sport Sciences, [S. l.], v. 27, n. 85, p. 177–196, 2024. DOI: 10.33899/rjss.2024.185223. Disponível em: https://rsprs.uomosul.edu.iq/index.php/rsprs/article/view/50530. Acesso em: 2 oct. 2025.