1. Abstract and Concrete Categories: The Joy of Cats;Adámek,2004
2. Branching bisimulation for context-free processes;Caucal,1992
3. A. Cheng, M. Nielsen, Open maps (at) work, BRICS Report Series 23, Aarhus University, 1995.
4. The categorical limit of a sequence of dynamical systems;Cuijpers,2013
5. Prefix orders as a general model of dynamics;Cuijpers,2013