Suarez, Margarita; De Armas, Merly; Ramirez, Oney; Alvarez, Amaury; Martinez-Alvarez, Roberto; Molero, Dolores; Seoane, Carlos; Liz, Ramon; De Armas, Hector Novoa; Blaton, Norbert M.; Peeters, Oswald M.; Martin, Nazario New Journal of Chemistry, 2005 , vol. 29, # 12 p. 1567 - 1576