1. Bourbaki, N.: Groupes et Alg�bres de Lie, Chap. 4, 5, 6. Hermann, Paris, 1968
2. Cannon, J.W., Epstein, D.B., Holt, D.F., Paterson, M.S., Thurston, W.P.: Word Processing and Group Theory. University of Minnesota Supercomputer Institute (1991) (preprint)
3. Davis, M.W., Shapiro, M.D.: Coxeter groups are automatic. Ohio State University (1991) (preprint)
4. Dyer, M.J.: Hecke algebras and reflections in Coxeter groups. PhD thesis, University of Sydney, 1987
5. Gersten, S.M., Short, H.B.: Small cancellation theory and automatic groups. Invent. Math.102 (1990) 305?334