1. IEC/TR 61508 “Functional safety of electrical/electronic/programmable electronic safety-related systems.
2. CENELEC EN 50129,”Railway applications - Communication, signaling and processing systems - Safety related electronic systems for signaling”.
3. CENELEC EN 50126, “The specification and demonstration of Reliability, Availability, Maintainability and Safety (RAMS)”.
4. ALARP Consortium (2001). D3.2 – Preliminary MT Design, Technical Report.
5. Verissimo, P. (2006). Travelling through wormholes: a new look at distributed systems models. SIGACT News 37, 1, 66-81.