1. Review: A.T. Balaban, M. Banciu, V. Ciorba, Annulenes, Benzo-, Hetero-, Homo-Derivatives, and their Valence Isomers, Vol. II, CRC, Boca Raton, FL, 1987, pp. 5–21.
2. Chemistry of Dewar Benzene. 1,2,5-Tri-t-Butylbicyclo[2.2.0]Hexa-2,5-Diene
3. A review of the Mills–Nixon effect: N.L. Frank, J.S. Siegel, Adv. Theor. Interesting Mol., 3 (1995) 209. A very recent overview: A.M. Rouhi, Chem. Eng. News, 74(14) (1996) 27. See also: F. Cardullo, D. Giuffrida, F.H. Kohnke, F.M. Raymo, J.F. Stoddart, D.H. Williams, Angew. Chem., Int. Ed. Engl., 35 (1996) 339.
4. A recent review: F. Bickelhaupt, F.H. de Wolf, Adv. Strain Org. Chem., 3 (1993) 185. The most recent approach: D.S. van Es, F.J.J. de Kanter, W.H. de Wolf, F. Bickelhaupt, Angew. Chem., Int. Ed. Engl., 34 (1995) 2553.
5. Spartan Users Guide, Versions (a) 3.0 and (b) 3.1, Wavefunction, Inc., Irvine, CA, (a) 1993 and (b) 1994.