Dr. Sh. Valedbagi. “Ab Initio Density Functional Theory Investigation of Structural and Electronic Properties of Double-Wall Zinc Oxide Nanotubes”. Global Journal of Science Frontier Research 12, no. A6 (March 15, 2012): 45–50. Accessed May 5, 2024. https://journalofscience.org/index.php/GJSFR/article/view/402.