Look-in, Charoen, Metta Pinthong, Kornkij Chaijenkij, Jeffery Pagaduan, and Weerawat Limroongreungrat. “THE VALIDITY OF CHRONOJUMP SYSTEM ® TO MEASURE VERTICAL JUMP”. Journal of Sports Science and Technology 18, no. 1 (July 7, 2018): 8–15. accessed March 6, 2026. https://he01.tci-thaijo.org/index.php/JSST/article/view/114078.