Betancourt Betancourt, Fabián Fernando, Alex David Machángara Quilca, and Alberto Raúl Gibert O’farril. “Pre-Sport Games and Attack Perfecting in School’s Volleyball”. Lecturas: Educación Física y Deportes 25, no. 266 (July 20, 2020): 87-97. Accessed November 10, 2026. https://efdeportes.com/efdeportes/index.php/EFDeportes/article/view/2321.