1. Group Theory and its Application to the Quantum Mechanics of Atomic Spectra;Wigner,1959
2. Diatomic Molecules According to the Wave Mechanics. II. Vibrational Levels
3. Vibrational Transition Probabilities for the Morse Oscillator
4. The Spectra of Diatomic Molecules;Herzberg,1950
5. Molecular Spectra and Molecular Structure;Herzberg,1939