Angermann, L., V. V. Yatsyk, and M. V. Yatsyk. “The Conversion of Excitation Energy into Generated Energy at the Resonant Frequencies of a Transparent Nonlinear Layer”. Advanced Electromagnetics 8, no. 1 (May 17, 2019): 66–74. Accessed October 4, 2025. https://aemjournal.metaconferences.org/index.php/AEM/article/view/1132.