Hassan, Irna Syafika, and Shahmir Hayyan Sanusi. 2022. “Performance Comparison of Mussel and Clam Shell Wastes As An Abrasive Agent Under Different Tooth Brushing Parameter”. Research Progress in Mechanical and Manufacturing Engineering 2 (2):912-21. https://publisher.uthm.edu.my/periodicals/index.php/rpmme/article/view/4835.