Electrochemical properties and electroacatalytic reduction of dioxygen by tetra-rutheniumcluster porphyrin films - Winnischofer, Herbert; Dovidauskas, Sergio; Otake, Vésper Yoshiyuki; Toma, Henrique Eisi; Araki, Koiti (International Conference on Porphyrins and Phthalocyanines, 2002)