Nguyen, Manh Thang, and Quang Quy Ho. “Creation of Hollow-Gaussian Beam for Optical Trap by Dual-Beam Nonliear Fabry-Perot Interferometer”. Communications in Physics 31, no. 3 (July 4, 2021): 335. Accessed March 21, 2023. https://vjs.ac.vn/index.php/cip/article/view/16029.