The effect of cation modifier on improving the luminescent properties of borate glasses doped with Yb3+ and Er3+ - Chialanza, Mauricio Rodríguez; Keuchkerian, Romina; Gonçalves, Tássia S.; de Camargo, Andrea Simone Stucchi; Fornaro, Laura (Journal of Non-Crystalline Solids, 2018)