Moreira, Alexandre, Gustavo Maia, Cristian Ramirez Lizana, Erik André Martins, and Paulo Roberto de Oliveira. “Reliability and Agreement of Vertical Countermovement Jump Test in under-21 Elite Soccer Players”. Journal of Physical Education 19, no. 3 (December 15, 2008): 413-421. Accessed September 14, 2025. https://periodicos.uem.br/ojs/index.php/RevEducFis/article/view/5996.