Electron paramagnetic resonance study of Cu(II) intercalated in bentonite - Nascimento, Otaciro Rangel; Donoso, José Pedro; Magon, Claudio José; Lima, José Fernando de; Moreno, M.; Benavente, E.; Gonzalez, G. (International Symposium on Non-Crystalline Solids - ISNCS, 2007)