“Mathematical Modeling the Electrical Impedance of Piezoceramic Disk Oscillating in Wide Frequency Range (Part 2. Medium Frequencies)”. Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, no. 97, Sept. 2024, pp. 38-45, https://doi.org/10.20535/RADAP.2024.97.38-45.