“Band Gap Mechanism for Armchair Single Walled Carbon Nanotubes and Metal Semiconductor Transition for Symmetry Breaking”. Bulletin of Pure and Applied Sciences – Physics 42, no. 2 (December 22, 2023): 75–79. Accessed May 18, 2024. https://acspublisher.com/journals/index.php/bpasphy/article/view/12537.