Загоровський, Д.І. “Increase of Efficiency of Active Vibroacustics Protection of the Speech Information Systems”. Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia0, no. 35 (October 2, 2007): 109-114. Accessed May 6, 2024. https://radap.kpi.ua/radiotechnique/article/view/324.