Mawuli, Seckley Emmanuel, Simons Anthony, and Dahunsi Olurotimi Akintunde. “Development of Asbestos-Free Disc Brake Pad Using Periwinkle Shell Powder and Coconut Shell Ash As Base Materials”. European Journal of Applied Sciences 10, no. 6 (December 15, 2022): 473–491. Accessed November 21, 2024. https://journals.scholarpublishing.org/index.php/AIVP/article/view/13534.