AL-JREW, Aws H.; MAHMOOD, Jawad R.; ALI, Ramzy S. Design of PLL Controller for Resonant Frequency Tracking of Five-Level Inverter Used for Induction Heating Applications. Iraqi Journal for Electrical and Electronic Engineering, [S. l.], v. 19, n. 2, p. 169–178, 2023. DOI: 10.37917/ijeee.19.2.19. Disponível em: https://ijeee.edu.iq/ijeee/article/view/478. Acesso em: 9 dec. 2025.