HAMED AL- AL-SWEEDE, A. The Effect of Using the Fixed and Variable Exercise Scheduling on Developing Some Basic Volleyball Skills. Al-Rafidain Journal For Sport Sciences, [S. l.], v. 24, n. 75, p. 26–43, 2021. DOI: 10.33899/rjss.2021.169799. Disponível em: https://rsprs.uomosul.edu.iq/index.php/rsprs/article/view/50163. Acesso em: 2 oct. 2025.