1. Jackson J (1999) Classical electrodynamics. Wiley, NJ, USA
2. Flügge S (2012) Practical quantum mechanics. Springer Science & Business Media
3. Berestetsky VB, Lifshitz EM, Pitaevsky LP (1968) Relativistic quantum theory, part 1. Nauka, Moscow (in Russian)
4. Bethe HA, Heitler W (1934) On the stopping of fast particles and on the creation of positive electrons. Proc Roy Soc A146:83–112
5. Koch HW, Motz JW (1959) Bremsstrahlung cross-section formulas and related Data. Rev Mod Phys 31(4):920–955