@inproceedings{inproceedings02a15a2c,
title   = {Low silica calcium aluminate glasses doped with erbium and yterbium to near and mid infrared lasers},
author = {Souza, D F de and Zonetti, L F C and Sampaio, J. A. and Baesso, Mauro Luciano and Gama, S and Nunes, Luiz Antônio de Oliveira},
year = {1998},
booktitle   = {Brazilian Symposium on Glasses and Related Materials}
}