On the experimental determination of 4f-4f Intensity parameters from the emission spectra of europium (III) compounds - Blois, Lucca; Carneiro Neto, Albano N; Longo, Ricardo L; Costa, Israel Ferreira da; Paolinia, Tiago B; Brito, Hermi Felinto de; Malta, Oscar L (Optics and Spectroscopy, 2022)