Sikam, P. . and Moontragoon, P. . (2017) “The Electronic Structure of N-doped ZnO Calculated by First Principle Calculation”, KKU Science Journal, 45(2), pp. 246–253. available at: https://ph01.tci-thaijo.org/index.php/KKUSciJ/article/view/249688 (accessed: 6 December 2025).