Pérez-Ifrán, Pablo, Andrés González-Ramírez, Julio Calleja-González, and Stefano Benítez Flores. “The Vertical Force-Velocity Profile in Male Under-20 National Team Rugby XV Union Players”. International Journal of Strength and Conditioning 4, no. 1 (August 16, 2024). Accessed October 4, 2025. https://journal.iusca.org/index.php/Journal/article/view/322.