@article{articlee681edfe,
title   = {Synthesis, characterization and spectroscopic investigation of new tetrakis (acetylacetonato)thulate(III) complexes containing alkaline metals as countercations},
author = {Guedes, M. A. and Paolini, Tiago Becerra and Felinto, Maria Claudia França da Cunha and Kai, J. and Malta, Oscar L and Nunes, Luiz Antônio de Oliveira and Brito, Hermi Felinto de},
year = {2011},
doi = {10.1016/j.jlumin.2010.09.006},
journal   = {Journal of Luminescence}
}