R. Y. Putra, W. Winarno, A. Junaidi, A. Yahyar, and Y. Mushofi, “The Effect of Plyometric Training Methods on Athlete Smash Ability Volleyball for Physical Education Students at Insan Budi Utomo University Malang”, JUMORA, vol. 6, no. 1, pp. 44–53, Feb. 2026.