AWAL, M. R.; JUSOH, M.; SABAPATHY, T.; AHMAD, R. B.; KAMARUDIN, M. R.; OSMAN, M. N.; AHMAD, M F.; RAHMAN, S. A.; DAGANG, A. N. A Patternless Piezoelectric Energy Harvester for Ultra Low Frequency Applications. International Journal of Integrated Engineering, [S. l.], v. 12, n. 7, p. 187–194, 2020. Disponível em: https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/7271. Acesso em: 8 apr. 2026.