Methane (Wikipedia)
D Opalka, W Domcke, High-order expansion of T2xe Jahn-Teller potential-energy surfaces in tetrahedral systems, CPL 494, 134 (2010)
I Alkorta, J Elguero, A theoretical study of the stationary structures of the methane surface with special emphasis on NMR properties, CPL 489, 35 (2010)
R van Harrevelt, First ultraviolet absorption band of methane: An ab initio study, JCP 126, 204313 (2007)
H Woerner, R van der Veen, F Merkt, Jahn-Teller Effect in the Methane Cation: Rovibronic Structure and the Geometric Phase, PRL 97, 173003 (2006)
M Paddon-Row, D Fox, J Pople, K Houk, D Pratt, Dynamic Jahn-Teller effect in methane radical cation. Location of the transition structures for hydrogen scrambling and inversion, JACS 107, 7696 (1985)