@inproceedings{inproceedings9f76a2fa,
title   = {Cooperative up-conversion in 'Yb POT.3+' doped phosphate glasses},
author = {Bell, Maria José Valenzuela and Oliveira, Samuel Leite de and Sousa, Dione Fagundes de and Nunes, Luiz Antônio de Oliveira},
year = {2002},
publisher = {SBF},
booktitle   = {Encontro Nacional de Física da Matéria Condensada}
}