DR. SABAH MOHAMMED YASEEN. THE EFFECT OF SELF-CONFIDENCE EXERCISES TO RAISE THE PERFORMANCE LEVEL OF THE SMASH SERVE AND SMASH SPIKING SKILLS IN VOLLEYBALL FOR JUNIORS. ResearchJet Journal of Analysis and Inventions, [S. l.], v. 3, n. 05, p. 27–39, 2022. DOI: 10.17605/OSF.IO/CB4FU. Disponível em: https://reserchjet.academiascience.org/index.php/rjai/article/view/485. Acesso em: 5 mar. 2025.