Luniov, S. V., O. V. Burban, and P. F. Nazarchuk. “Calculation of the Ground-State Ionization Energy for Shallow Donors in N-Ge Single Crystals Within the Δ1-Model for the Conduction Band”. Ukrainian Journal of Physics 60, no. 10 (January 10, 2019): 1022. Accessed April 20, 2024. https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2019159.