LIN, Y.-F. .; KAO, Y.-C. .; CHEN, H.-M. .; PAN, S.-C. . Bidirectional Radiated Circularly Polarized Annular-Ring Slot Antenna for Portable RFID Reader. Applied Computational Electromagnetics Society Journal (ACES), [S. l.], v. 25, n. 3, p. 182–189, 2022. Disponível em: https://journals.riverpublishers.com/index.php/ACES/article/view/15603. Acesso em: 13 may. 2026.