Nikiforov, Andrey, and Polina Kushnir. “ENERGY SAVING. PIEZOGENERATORS”. HUMAN. ENVIRONMENT. TECHNOLOGIES. Proceedings of the Students International Scientific and Practical Conference, no. 22 (April 25, 2018): 43–49. Accessed May 2, 2024. https://journals.ru.lv/index.php/HET/article/view/3638.