1. Blech, J.O., Biha, S.O.: On formal reasoning on the semantics of PLC using Coq. CoRR abs/1301.3047 (2013)
2. Darvas, D., Majzik, I., Blanco Viñuela, E.: Formal Verification of Safety PLC Based Control Software, pp. 508–522. Springer, Cham (2016)
3. DO-178C: Software Considerations in Airborne Systems and Equipment Certification. Special Committee 205 of RTCA (2011)
4. IEC: 61131-3 Ed. 3.0 en:2013: Programmable Controllers—Part 3: Programming Languages. International Electrotechnical Commission (2013)
5. IEEE 7-4.3.2: Standard for Digital Computers in Safety Systems of Nuclear Power Generating Stations (Revision of IEEE Std 7-4.3.2-2003). The Institute of Electrical and Electronics Engineers (IEEE) (2010)