Burak, Ya.V., V.T. Adamiv, I.M. Teslyuk, I.Ye. Moroz, and S.Z. Malynych. “What Is the True Value of Bulk Band Gap of Lithium Tetraborate Single Crystal?”. Physics and Chemistry of Solid State 23, no. 1 (March 13, 2022): 113–119. Accessed April 19, 2024. https://scijournals.pnu.edu.ua/index.php/pcss/article/view/5369.