AHMED ABDULLAH, S.; شهلة. The impact of the educational system using immediate feedback in learning the skills of numbers and sending from the bottom volleyball. Al-Rafidain Journal For Sport Sciences (RJSS), [S. l.], v. 22, n. 70, p. 190–203, 2025. DOI: 10.33899/rajsport.2019.163307. Disponível em: https://ojs.uomosul.edu.iq/index.php/rjss/article/view/10631. Acesso em: 4 aug. 2025.