Nurul Afiqah Ibrahim, and Nur Anida Jumadi. “Formulating the Relationship of Mean Kicking Angle and Leg Flexibility Index for Silat Athletes Using Regression Analysis”. Evolution in Electrical and Electronic Engineering, vol. 2, no. 1, May 2021, pp. 228-35, https://publisher.uthm.edu.my/periodicals/index.php/eeee/article/view/1724.