“A Numeric Study on the Influence of the Values of the Parameter P in Kronig: Peneny Equation on the Width of the Bands”. Hadhramout University Journal of Natural & Applied Sciences 15, no. 2 (December 3, 2023). Accessed July 29, 2026. https://hu.edu.ye/hu-publications/journals/index.php/hujnas/article/view/128.