1. Christensen, J. “Design patterns for systems engineering with IEC 61499.” In Verteilte Automatisierung - Modelle und Methoden für Entwurf, Verifikation, Engineering und Instrumentierung, Ch. Döschner, ed. Magdeburg, Germany: Otto-von-Guericke-Universität, 2000.
2. IEC (International Electrotechnical Commission) 61499–1, Function blocks - Part 1, Architecture, Geneva, 2000.
3. EEC (International Electrotechnical Commission) 61499–2, Function blocks - Part 1, Software tool requirements, Geneva, 2001.
4. IEC (International Electrotechnical Commission) 61131–3, Programmable controllers - Part 3, Programming languages, Geneva, 2002.
5. ISO (International Organization for Standardization) TR 8509, Information processing systems - Open Systems Interconnection - Service conventions, Geneva, 1987.