Influence of the Electrical Test Setup on the Voltage Gain Measurement of an Unloaded Rosen-Type Piezoelectric Transformer Vibrating in the First Three Modes. MSR [Internet]. 2024 Aug. 30 [cited 2025 Sep. 10];24(4):137-44. Available from: https://journals.savba.sk/index.php/msr/article/view/2381