1. Strain, K. A. Proceedings of the 8th Marcel Grossman Meeting on General Relativity and Gravitation. pp.176–193. Singapore: World Scientific.
2. A compact optical isolator
3. LEYSOP Ltd (manufacturers and suppliers of electro-optic components), 17 Repton Court, Burntmills, Basildon, Essex, UK
4. Jenkins, F. A. and White, H. E. 1981.Fundamentals of Optics,, 4th edition, 510New York: McGraw-Hill International. See for example
5. Longhurst, R. S. 1973.Geometrical and Physical Optics,, 3rd edition, 533–542. London: Longman Group. For a more detailed study of double refraction in calcite, see