Lev, B. I., V. P. Ostroukh, V. B. Tymchyshyn, and A. G. Zagorodny. “Electron Distribution on a Deformed Liquid-Helium Surface”. Ukrainian Journal of Physics 60, no. 3 (January 21, 2019): 247. Accessed April 23, 2024. https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2019260.