An efficient Piezoelectric Energy Harvester. International Journal of Current Engineering and Technology, [S. l.], v. 5, n. 6, p. 3525–3527, 2015. DOI: 10.14741/. Disponível em: https://ijcet.evegenis.org/index.php/ijcet/article/view/2963. Acesso em: 26 apr. 2026.