LE TRONG, H.; TRAN TRONG, T.; HOANG VAN, D. A design approach for compact ultra-wideband bandpass filter based on hybrid microstrip coplanar waveguide resonators. Journal of Military Science and Technology, [S. l.], n. RD, p. 169–174, 2021. Disponível em: https://jmst.mod.gov.vn/index.php/jmst/article/view/2367. Acesso em: 13 nov. 2026.