On Ba0.5Sr0.5Co1-yFeyO3-delta (y=0.1-0.9) oxides as cathode materials for La0.9Sr0.1Ga0.8Mg0.2O2.85 based IT-SOFCs - Pena-Martinez, J.; Marrero-Lopez, D.; Ruiz-Morales, J. C.; Nunez, P.; Sanchez-Bautista, C.; Dos Santos-Garcia, A. J.; Canales-Vazquez, J.; (International Journal Of Hydrogen Energy, 2009)