Christensen, Søren, and Leif Obel Jepsen. “Modelling and Simulation of a Network Management System Using Hierarchical Coloured Petri Nets: Extended Version”. DAIMI Report Series 20, no. 349 (October 1, 1994). Accessed December 10, 2025. https://tidsskrift.dk/daimipb/article/view/6579.