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3. Lecture Notes in Computer Science;M. Weber,2003
4. ISO/JTC1/SC7/WG19: Software and Systems Engineering – High-level Petri Nets, Part 2: Transfer Format. FDIS 15909-2 (under ballot), v. 1.3.6, ISO/IEC (2008)
5. Kindler, E.: Modular PNML revisited: Some ideas for strict typing. In: Proc. AWPN 2007, Koblenz, Germany (2007)