Hager , I. Z. . and Saleh , I. A. . (2022) “Effect of Er2O3 and ErF3 on the optical properties of sodium oxyfluoroborate glasses”, The Scientific Journal of University of Benghazi, 35(2). Available at: https://journals.uob.edu.ly/sjuob/article/view/3805 (Accessed: 3 December 2023).