1. Applications of Process Algebra;Baeten,1990
2. Simula Begin;Birtwistle,1979
3. Demos — Discrete event modelling on Simula;Birtwistle,1979
4. University of Calgary Research Report number 81/70/22;Birtwistle;Demos implementation guide and reference manual,1981
5. The algebra of recursively defined processes and the algebra of regular processes;Bergstra,1984