“The Double-Mode Teragertz Oscillator With the Nonuniform Focusing Field”. Visnyk of V.N. Karazin Kharkiv National University, series “Radio Physics and Electronics”, no. 24 (June 21, 2016): 60–66. Accessed October 24, 2026. https://periodicals.karazin.ua/radiophysics/article/view/6386.