1. Some recent developments in the theory of molecular energy levels;Longuet-Higgins,1961
2. Quantitative insights about molecules exhibiting Jahn-Teller and related effects
3. The Jahn–Teller Effect;Bersuker,2006
4. G. Herzberg, Molecular Spectra and Molecular Structure. Vol III: Electronic Spectra and Electronic Structure of Polyatomic Molecules, second reprint ed., Krieger Publishing Company, Malabar, 1991.
5. Intersection of potential energy surfaces in polyatomic molecules