1. Goodenough, J. B. & Longo, J. M. Landolt-Boernstein, Numerical Data and Functional Relationships in Science and Technology New Series Vol. III.4, 126 (Springer, Berlin, 1970).
2. Adachi, M. et al. Landolt-Boernstein, Numerical Data and Functional Relationships in Science and Technology New Series Vol. 16, 45 (Springer, Berlin, 1970).
3. Khomskii, D. I. Magnetism and ferroelectricity: why do they so seldom coexist? Bull. Am. Phys. Soc. C21.002 (2001).
4. Hill, N. A. Density functional studies of multiferroic magnetoelectric. Annu. Rev. Mater. Res. 32, 1–37 (2002).
5. Cohen, R. E. Origin of ferroelectricity in oxide ferroelectrics and the difference in ferroelectric behavior of BaTiO3 and PbTiO3 . Nature 358, 136–138 (1992).