“Device of Protection of Analog Telephone Communication Based on Scrambler With Change of Wavelet Conversion Coefficients”. Visnyk of Vinnytsia Politechnical Institute, no. 2 (May 4, 2023): 89–96. Accessed October 10, 2026. https://visnyk.vntu.edu.ua/index.php/visnyk/article/view/2868.