@article{article21b9c255,
title   = {Cooperative upconversion, radiation trapping end self-quenching effects in highly Yb3+ - doped oxyfluoride glasses},
author = {Santos, W. Q. and de Camargo, Andrea Simone Stucchi and Wu, D. and Silva, W. F. and Zhang, L. and Jacinto, C.},
year = {2013},
doi = {10.1166/sam.2013.1661},
journal   = {Science of Advanced Materials}
}