“Electrical Impedance Mathematical Modeling of Piezoceramic Disc Oscillating in Wide Frequency Range (Part 3. High Frequencies)”. 2025. Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, no. 99 (March): 15-23. https://doi.org/10.20535/RADAP.2025.99.15-23.