BEDRA, S.; BENKOUDA, S.; AMIR, M.; FORTAKI, T. Resonant Frequency of Tunable Microstrip Ring Antenna Printed on Isotropic or Uniaxially Anisotropic Substrate. Advanced Electromagnetics, [S. l.], v. 2, n. 2, p. 6–9, 2013. DOI: 10.7716/aem.v2i2.194. Disponível em: http://aemjournal.metaconferences.org/index.php/AEM/article/view/194. Acesso em: 16 feb. 2025.