@inproceedings{inproceedingse4a42a6c,
title   = {Thermal Lens meassurements of energy transfer upconversion},
author = {Andrade, A. A. and Souza, D. F. de and Nunes, Luiz Antônio de Oliveira and Catunda, Tomaz},
year = {2002},
publisher = {SBF},
booktitle   = {Encontro Nacional de Física da Matéria Condensada}
}