WOO, Dong Sik; LEE, Cherl-Hee; KIM, Kang Wook; CHOI, Hyun-Chul. An Octave Bandwidth Metamaterials-based Hexagonal Patch Antenna. Elektronika ir Elektrotechnika, [S. l.], v. 21, n. 5, p. 44–47, 2015. DOI: 10.5755/j01.eee.21.5.13325. Disponível em: https://eejournal.ktu.lt/index.php/elt/article/view/13325.. Acesso em: 12 feb. 2026.