Umar, Mohd Faudzi, and Nurisya Mohd Shah. “Newton’s Second Law on Positive Real Line R_+”.
Journal of Science and Mathematics Letters 11 (November 9, 2023): 158–162. Accessed March 31, 2025.
https://ejournal.upsi.edu.my/index.php/JSML/article/view/8756.