RAGIŃ, Tomasz et al. Fabrication and Properties of Erbium-Doped Gallo-Germanate Glass Thin Films via RF-Sputtering. Photonics Letters of Poland, [S. l.], v. 17, n. 1, p. 1–3, 2025. DOI: 10.4302/plp.v17i1.1310. Disponível em: http://m.photonics.pl/PLP/index.php/letters/article/view/17-1. Acesso em: 4 apr. 2025.