Srimuang, T. ., T. . Japa, and T. . Butaka. “The Plyometric Training on Thigh Strength in Youth Male Volleyball Players Wapipathum School Mahasarakham”. Journal of Research and Development Institute Rajabhat Maha Sarakham University, vol. 9, no. 3, Dec. 2022, pp. 615-26, https://so03.tci-thaijo.org/index.php/rdirmu/article/view/256378.