Figueiredo, F. M., Waerenborgh, J. C., Kharton, V. V., Näfe, H., & Frade, J. R. (2003). On the relationships between structure, oxygen stoichiometry and ionic conductivity of CaTi1-xFexO3-δ (x=0.05, 0.20, 0.40, 0.60). Solid State Ionics, 156, 371-381.