Oleynikov, A.N., V.A. Pulavskyi, and O.H. Bilotserkivets. 2023. “Ways to Improve the Efficiency of Methods and Means of Counteracting Unauthorized Speech Recording and Their Comparative Analysis”. Radiotekhnika 1 (212):85-89. https://doi.org/10.30837/rt.2023.1.212.07.