“A Study of The Geometrical Optimization and ‎Energies of Carbon Nanoribbons: B3LYP DFT”. JOURNAL OF UNIVERSITY OF BABYLON for Pure and Applied Sciences, vol. 26, no. 2, Dec. 2017, pp. 163-72, https://www.journalofbabylon.com/index.php/JUBPAS/article/view/527.