1. Abrial JR (1996) The B-book. Cambridge University Press, Cambridge
2. Atchison B, Lindsay P, Tombs D (1999) A case study in software safety assurance using formal methods. Technical Report No. 99-31, Software Verification Research Centre, School of Information Technology, The University of Queensland, Australia, September 1999
3. Booch G, Jacobson I, Rumbaugh J (1998) The unified modeling language user guide. Object Technology series, Addison–Wesley, Reading
4. Bowen JP (1996) Formal specification and documentation using Z: a case study approach. International Thomson Computer Press, London
5. Bowen JP (2000) The ethics of safety-critical systems. Commun ACM 43(4): 91-97