Ultraviolet upconversion luminescence in a highly transparent triply-doped Gd3+-Tm3+-Yb3+ fluoride-phosphate glasses - Galleani, Gustavo; Santagneli, Silvia Helena; Ledemi, Yannick; Messaddeq, Younès; Janka, Oliver; Pöttgen, Rainer; Eckert, Hellmut (Journal of Physical Chemistry C, 2018)