1. M. Born, R. Oppenheimer, Zur Quantentheorie der Molekeln. German. Ann. Phys. 389, 457–484 (1927)
2. G. Herzberg, Molecular Spectra and Molecular Structure I Spectra of Diatomic Molecules (D. Van Nostrand Company Inc, New York, 1950)
3. G. Herzberg, Molecular Spectra and Molecular Structure II Infrared and Raman Spectra of Polyatomic Molecules (Krieger Publishing Company, Malabar, 1991)
4. P. Hamm, M. Zanni, Concepts and Methods of 2D Infrared Spectroscopy (Cambridge University Press, Cambridge, 2011)
5. L. Pauling, E.B. Wilson, Introduction to Quantum Mechanics (McGraw-Hill Book Company, Inc., New York, 1935)