ذنون الإمام ص. The Effect of Synchronization Training on learning free swimming by students of the Physical Education College. College of Basic Education Research Journal, [S. l.], v. 8, n. 4, p. 333–347, 2009. Disponível em: https://stats.uomosul.edu.iq/index.php/berj/article/view/39898. Acesso em: 26 oct. 2025.