Luminescence in colorless, transparent, thermally stable thin films of 'Eu POT.3+' and 'Tb POT.3+' 'beta'-diketonates in hybrid inorganic-organic zinc-based sol-gel matrix - Martins, Renata Figueiredo; Silva, Rodrigo Ferreira; Gonçalves, Rogéria Rocha; Serra, Osvaldo Antonio (Journal of Fluorescence, 2010)