BADNILCAR, S.; SHANMUGAM, N.; MURTHY, V. Resonant frequencies of whispering gallery modes of dielectric resonator. Defence Science Journal, [S. l.], v. 51, n. 2, p. 189–193, 2002. DOI: 10.14429/dsj.51.2229. Disponível em: https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/2229. Acesso em: 16 jun. 2025.