Mat Yeng, Muhamad Safuan, Shahrul Kadri Ayop, and Muhammad Yunus Hamid. 2017. “The Determination of Laser Spot Size of an Optical Tweezers by Stuck Bead Method”. Journal of Science and Technology 9 (3). https://publisher.uthm.edu.my/ojs/index.php/JST/article/view/2058.