1. M Mostovoy. Multiferroics: A magnetic twist for ferroelectricity. 2007
2. NA Spaldin. Multiferroics: Progress and prospects in thin films. 2007
3. H Zheng. Epitaxial BiFeO multiferroic thin film heterostructures. 2003
4. A Filippetti. The origin of ferroelectricity in magnetoelectric YMnO. 2004
5. YK Jeong. Artificially imposed hexagonal ferroelectricity in canted antiferromagnetic YFeO epitaxial thin films. 2013