1. D. M. Smyth , The Defect Chemistry of Metal Oxides, Oxford University Press, New York, 2000, ch. 14
2. H.-I. Yoo , in Ceramics Science and Technology: Properties, ed. R. Riedel and I. -W. Chen, Wiley-VCH, Weinheim, 2010, vol. 2, ch. 10
3. Dielectric materials for sintering in reducing atmospheres