Bade, Abdullah, Norhaida Suaib, Abdullah Mohd Zin, and Tengku Mohd Tengku Sembok. 2006. “New Bounding Volume Approach for Detecting Collision in Computer Animation”. Malaysian Journal of Computer Science 19 (2):127-40. https://mjcs.um.edu.my/index.php/MJCS/article/view/6278.