1. J. D. Jackson, Classical Electrodynamics (Wiley, London, 1998)
2. N. Mermin, N. Ashcroft, Solid State Physics (Brooks/Cole, Pacific Grove, 1976)
3. C. Kittel, Introduction to Solid State Physics (Wiley, London, 2004)
4. R.W. Boyd, Nonlinear Optics (Academic, Cambridge, 2020)
5. G. New, Introduction to Nonlinear Optics (Cambridge University Press, Cambridge, 2011)