Van Trong, Dang, Le Tran Bao Tran, Chu Van Lanh, Nguyen Thi Hong Phuong, Nguyen Minh Hang Trang, Hoang Trong Duc, & Nguyen Thi Thuy. " Study on Optical Features of Circular Photonic Crystal Fibers with Various Air-hole Size." VNU Journal of Science: Mathematics - Physics [Online], 38.4 (2022): n. pag. Web. 22 Dec. 2024