1. Bale, E. A., 1999, MSc Engineering Management Dissertation, (Department of Chemical Engineering, Loughborough University, Loughborough,Leicestershire).
2. Collins English Dictionary and Thesaurus, 1995 (Harper Collins).
3. Man Made Disasters;Turner,1978
4. Lees, Frank P., 1996, Loss Prevention in the Process Industries: Hazard Identification, Assessment and Control, Volume 3, 2nd edition, Appendix 2, pp 2/1–2/10, Appendix 5, pp 5/1–5/11, Appendix 19, pp 19/1–19/16 (Butterworth-Heinemann).
5. Kletz, T., 1993, Lessons From Disasters; How Organisations Have No Memory and Accidents Recur, Chapter 2, Chapter 7, pp 102-108 (IChemE).