Tsyganov, I., N. Guseinov, R. Nemkaeva, B. Borisov, and A. Ilyin. “Experimental Study of Irradiated Few-Layer Graphene”. Recent Contributions to Physics, vol. 2012, no. 2, June 2012, pp. 20-24, https://bph.kaznu.kz/index.php/zhuzhu/article/view/688.