Sungpook, N., J. Singchainara, A. Soachalem, K. Polsorn, and T. T. Santiboon. “Improving Footballers Agility Performances Outcomes With the Smart Ladder Drill Prototype Inventory for Exercising Efficiency”. Journal of Human Sport and Exercise, vol. 18, no. 1, Jan. 2023, pp. 242-58, doi:10.14198/jhse.2023.181.19.