Borisenko, D., P. Walmsley, A. Golov, N. Kolesnikov, Y. Kotov, A. Levchenko, and M. Fear. “Field-Emission Source of Chages Based on Nanotubes for Low Temperature Experiments”. Recent Contributions to Physics, vol. 2015, no. 3, Jan. 2015, pp. 27-28, https://bph.kaznu.kz/index.php/zhuzhu/article/view/803.