Makhanets, O. M., A. I. Kuchak, and V. I. Gutsul. “Spectral Parameters of Electron in a Multishell Semiconductor Cylindrical Nanotube With a Donor Impurity at Its Axis”. Ukrainian Journal of Physics 59, no. 8 (October 24, 2018): 819. Accessed March 29, 2024. https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2018515.