Van Trong, Dang, 		Tran Bao Tran, Le, 		Van Lanh, Chu, 		Thi Hong Phuong, Nguyen, 		Trang, Nguyen Minh Hang, 		Trong Duc, Hoang, AND 		Thi Thuy, Nguyen.
" Study on Optical Features of Circular Photonic  Crystal Fibers with Various Air-hole Size" <em>VNU Journal of Science: Mathematics - Physics</em> [Online], Volume 38 Number 4 (17 December 2022)