1. G. Hertberg, Molecular spectra and Molecular structure I: Spectra of diatomic molecules, Van Nostrand Reinhold, ISBN: 0-442-03385-0, 1950, pp. 252–258.
2. I. M. Mills, Coriolis Interactions, Intensity Perturbations and Potential Functions in Polyatomic Molecules, Department of chemistry, University of Reading, U.K. Internal Documents, and in molecular spectroscopy modern research vol. II. Infrared and Raman Spectrtra of Polyatomic molecules, Van Nostrand, N.Y., 1972.
3. J.K.G. Watson, (Ed.), Vibrational Spectra and Structure, Elsevier, 1977, pp. 1–89.
4. Avoided crossings in molecular beam electric resonance spectroscopy: the observation of forbidden (ΔK = ±1, ±2 and ±3) transitions in phosphoryl fluoride (OPF3);Ozier;Phys. Rev. Letts.,1978
5. Vibration-torsion-rotation analysis of the ν12 band of CH3CD3;Moazzen-Ahmadi;J. Chem. Phys.,1998