31.9 REFERENCES

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Eberhard, A, "Safety in Programmable Applications", Automation World, Nov., 2004.

Kenner, R. H., "The Use of Simulation Within a PLC to Improve Program Development and Testing", Proceedings of the First Automation Fair, Philadelphia, 1990.

McCrea-Steele, R., "Proven-in-Use: Making the right choices for process safety", Hotlinks, Invensys, Summer 2003.

Paques, Joseph-Jean, "Basic Safety Rules for Using Programmable Controllers", ISA Transactions, Vol. 29, No. 2, 1990.