1. The theory of stochastic processes;Cox,1965
2. Singh C, Billinton R. System reliability modelling and evaluation, Hutchinson, London, 1977.
3. Faria JA. Dependability modeling, analysis and evaluation of industrial information systems, PhD thesis, Porto University, Portugal 1996.
4. Long D, Park J. A study of the reliability of internet sites. Proceedings IEEE, New York, USA, 1991.
5. On the dependability design of manufacturing information systems;Quintas;Int J Flexible Manufactur Syst,1998