1. M. Born: Optik (Springer, Berlin 1933);
2. M. Born, E. Wolf: Principles of Optics (Pergamon, Oxford 1964)
3. S. Szivessy: “Kristalloptik”, in Handbuch der Physik, Vol.20 (J. Springer, Berlin 1928) p.635
4. G.N. Ramachandran, S. Ramaseshan: “Crystal Optics”, in Encyclopedia of Physics, Vol.25/1 (Springer, Berlin, Göttingen, Heidelberg 1961)
5. V.M. Agranovich, A.A. Rukhadze: Zh. Eksp. Teor. Fiz. 35. 982 (1958) [English transl.: Sov. Phys. JETP 35, 685 (1959)]