Irmayanti, I., M. S. Hasan, and H. Hakim. “The Contribution of Hand Reaction Speed and Arm Muscle Strength to Tsuki Chudan’s Gyaku Punch Speed On Karateka Inkanas UNM Twigs”. Journal of Sport Education, Coaching, and Health (JOCCA), vol. 4, no. 1, Mar. 2023, pp. 44-53, doi:10.35458/jc.v4i1.1579.