1. Magnetoelectric Interaction Phenomena in Crystals, Ed. by A. J. Freeman and H. Schmid (Gordon and Breach, London, 1975).
2. G. A. Smolenskii and I. E. Chupis, Usp. Fiz. Nauk 137, 415 (1982) [Sov. Phys. Usp. 25, 475 (1982)].
3. R. R. Birss, Symmetry and Magnetism (North-Holland, Amsterdam, 2000).
4. H. Schmid, Magnetoelectric Effects in Insulating Magnetic Materials, reprinted from Introduction to Complex Mediums for Optics and Electromagnetics, Ed. by W. S. Weigloger and A. Lakhtakia (SPIE Press, Bellingham, WA, 2003).
5. M. Fiebig, C. Degenhardt, and R. V. Pisarev, Phys. Rev. Lett. 88, 027203 (2002).