@inproceedings{inproceedings4271ccfe,
title   = {Optical spectroscopic study of ´Tm POT.+3´ and ´Ho POT.+3´ codoped fluoride glasses},
author = {Souza, D F de and Zonetti, L F C and Bell, M J V and Lebullenger, Ronan Michel and Nunes, Luiz Antônio de Oliveira},
year = {1998},
booktitle   = {Brazilian Symposium on Glasses and Related Materials}
}