Rashba, Georgiy I. “Toward a Theory of the Impurity States of Electrons in Two-Dimensional Electron Gas”. Journal of V. N. Karazin Kharkiv National University. Series Physics0, no. 27 (January 18, 2018): 6-10. Accessed May 5, 2024. https://periodicals.karazin.ua/physics/article/view/10938.