Structural and spectroscopic properties of luminescent 'Er POT.3+'-doped Si'O IND.2'-'Ta IND.2''O IND.5' nanocomposites - Ferrari, Jefferson L.; Lima, Karmel O.; Maia, Lauro J. Q.; Ribeiro, Sidney J. L.; Gonçalves, Rogéria Rocha (Journal of The American Ceramic Society, 2011)