@inproceedings{inproceedings2ebbeb7b,
title   = {Erbium and yterbium concentration dependence of thermal, mechanical and optical properties in low silica content calcium aluminosilicate glasses},
author = {Sampaio, J. A. and Catunda, Tomaz and Gama, S. and Bento, A. C. and Miranda, L. C. and Baesso, Mauro Luciano},
year = {1999},
booktitle   = {Brazilian Symposium on Glasses and Related Materials}
}