Sulfite induced autoxidation of Cu(II)/tetra/penta and hexaglycine complexes. Spectrophotometric and rotating-ring-disk glassy carbon electrode studies and analytical potentialities - Alipázaga, María V.; Bonifácio, Rodrigo Leandro; Kosminsky, Luis; Bertotti, Mauro; Coichev, Nina (Journal of the Brazilian Chemical Society, 2003)