Electronic and catalytic properties of $La_{1-x}Sr_{x}Co_{1-y-z}Fe_{y}Ni_{z}O_{3}$ perovskites : cathode materials for SOFC / J. MOLENDA, K. ŚWIERCZEK, J. MARZEC // W: MH 2004 : international symposium on Metal-Hydrogen systems : fundamentals & applications : 5–10 September 2004 Cracow, Poland : abstracts / eds. H. Figiel, P. Mietniowski, A. Paja ; AGH University of Science and Technology. Faculty of Physics and Applied Computer Science. Department of Solid State Physics. — [Kraków : AGH UST], [2004]. — S. 40, Poster Mo-015