1. G.B. Arfken, H.J. Weber, F.E. Harris, Mathematical Methods for Physicists, 7th edn. (Elsevier, San Diego, 2013)
2. J.D. Jackson, Classical Electrodynamics, 3rd edn. (Wiley, New York, 1999)
3. W. Demtroder, Atoms, Molecules and Photons; An Introduction to Atomic-, Molecular- and Quantum-Physics (Springer, Berlin, 2006)
4. D. Hanstorp, C. Bengtsson, D.J. Larson, Phys. Rev. A 40, 670 (1989)
5. K. Chartkunchand, Dissertation (University of Nevada, Reno, 2015)