1. Bilbao Crystallographic Server, Available at: http://www.cryst.ehu.es (accessed 07.09.15), see Structure, IR, Raman and Hyper-Raman Activity; Kroumovaa, E., Aroyoa., M.I., Perez-Matoa, J.M., et al., 2003. Bilbao crystallographic server : Useful databases and tools for phase-transition studies. Phase Transitions 76, (1–2), 155–170.
2. Molecular Vibrations;Bright Wilson,1955
3. Light Scattering in Magnetic Solids;Cottham,1986
4. Optical techniques for systems with competing interactions, In: Introduction to Highly Frustrated Magnetism;Deisenhofer,2011