1. A.R. Katrizky, C.W. Rees, E.F.V. Scriven (Eds.), Comprehensive Heterocyclic Chemistry II, vol. 2, Pergamon Press, Oxford, 1996.
2. The Energetics of Aromatic Hydrocarbons: An Experimental Thermochemical Perspective
3. D.P. Phillion, D.S. Braccolino, M.J. Graneto, W.G. Phillips, K.A. Van Sant, D.M. Walker, S.C. Wong, European Patent CODEN: EPXXDW EP 538231 A1 19930421 (1993).
4. C. Chig-te, C. Kuo-mou, L. Wann-huang, L. Fen-lan, W. Rong-tsun, US Patents 5602170 (1997); 5747525 (1998); 5753692 (1998).