Structure-property relations in new fluorophosphate glasses singlyand co-doped with Er3+ and Yb3+ - Gonçalves, Tassia S.; Silva, Raphaell J. Moreira; Oliveira Junior, Marcos de; Ferrari, Cynthia R.; Poirier, Gäel Y.; Eckert, Hellmut; de Camargo, Andrea Simone Stucchi (Materials Chemistry and Physics, 2015)