Setijono, H., L. Yuri, O. Wiriawan, and K. Ashadi. “Determining Reaction Time and Strength in Indonesian Male Badminton Athletes: Regional, National and Olympic Levels”. Physical Education Theory and Methodology, vol. 24, no. 4, Aug. 2024, pp. 602-8, doi:10.17309/tmfv.2024.4.12.