1. Physical Chemistry (5th Edition), Peter Atkins, Freeman 1996 (ISBN 0–7167–2402–2)
2. Introduction to Organic Chemistry, A. Stretweiser and C. Heathcock, MacMillan 1981 (ISBN 0–02–418050–5)
3. Electronic Structure and the Properties of Solids, Walter A. Harrison, Freeman 1980 (ISBN 0–7167–1000–5)
4. Thermochemical Kinetics, Sidney Benson, Wiley 1976 (ISBN 0–471–06781–4)
5. “The Response of Electrons to Structural Changes” K. Wiberg et al , Science v. 252 p. 1266 (1991)