Kartashov, V.M., V.N. Oleynikov, S.A. Sheyko, S.I. Babkin, I.V. Koryttsev, O.V. Zubkov, and A.M. Anokhin. 2017. “Information Characteristics of Sound Emission from Small Unmanned Aerial Vehicles”. Radiotekhnika 4 (191):181-87. https://doi.org/10.30837/rt.2017.4.191.18.