EXPERIMENTAL TESTS WITH PIEZOELECTRIC HARVESTER FOR TUNING RESONANT FREQUENCY TO VIBRATING SOURCE . REVUE ROUMAINE DES SCIENCES TECHNIQUES — SÉRIE ÉLECTROTECHNIQUE ET ÉNERGÉTIQUE, [S. l.], v. 67, n. 4, p. 457–460, 2022. Disponível em: https://journal.iem.pub.ro/rrst-ee/article/view/307.. Acesso em: 25 nov. 2024.