RIVAS VALLES, Gildardo. An Estimation of the Optical Constants of Copper Based on the FEFF 9 Package. Acta Universitaria, [S. l.], v. 31, p. 1–20, 2021. DOI: 10.15174/au.2021.3215. Disponível em: https://www.actauniversitaria.ugto.mx/index.php/acta/article/view/3215. Acesso em: 7 may. 2026.