Mohammed Jawad H. Kadhim, Ali S. Hasan, and Q. A. AL-Jarwany. “Electronic, Spectral and Structural Characteristics of Carbon Nanotubes: Gallium Nitride As an Optoelectronic Applications”. Eurasian Journal of Physics,Chemistry and Mathematics, vol. 5, Apr. 2022, pp. 37-46, https://geniusjournals.org/index.php/ejpcm/article/view/1067.