Ноздрачова, К. Л., and Г. М. Сучков. “NON-CONTACT CAPACITIVE METHOD OF EXCITATION AND RECEIVING OF ELASTIC WAVES”. METHODS AND DEVICES OF QUALITY CONTROL, no. 2(31), Nov. 2013, pp. 3-6, https://mpky.nung.edu.ua/index.php/mpky/article/view/167.