ФИЛИПЕНКО, А.; ДОНСКОВ, А. Investigation of the characteristics of the band gap on a refractive index of materials. Radiotekhnika, [S. l.], v. 2, n. 189, p. 166–171, 2017. Disponível em: https://rt.nure.ua/article/view/184432. Acesso em: 2 may. 2026.