Spectrophotomeric determinations of stoichiometries and association constants of the inclusion complexes between 'beta'-cyclodextrin and quercetin chelates of Zn(II) and Al(III) ions - Dias, Karina; Souza, Rubens F. V. de; Nikolaou, Sofia; De Giovani, Wagner Ferraresi (Brazilian Meeting on Inorganic Chemistry (BMIC, 2004)