AEED, Anas Abdel Sattar; AWAD, Juma Muhammad. The effect of mental-muscular relaxation exercises in developing the skills of blocking the wall and defending the court for volleyball players. Kufa Journal of Physical Education Sciences, Kufa, Najaf, Iraq, v. 1, n. 3, p. 78–93, 2021. Disponível em: https://journal.uokufa.edu.iq/index.php/kjpes/article/view/15402. Acesso em: 25 jun. 2026.