Lugovskyi, O., A. Movchanyuk, and V. Fesich. “To the Question about the Calculation of the Ultrasonic Step-up Transformer of Vibrating Speed With the Developed Radiance Surface”. Mechanics and Advanced Technologies, no. 1(85), Apr. 2019, pp. 49-56, doi:10.20535/2521-1943.2019.85.164346.