L. Bakker, C., M. F. Watson, and J. A. Moody. “Kinematics of Assisted and Unassisted Plyometric Training of Vertical Jumping and Rebounding in Youth Male Football Players – A Six-Week Training Study”. International Journal of Physical Education, Fitness and Sports, vol. 9, no. 2, June 2020, pp. 57-71, doi:10.34256/ijpefs2028.