Nielsen, M. & Winskel, G. (1995).
Models for Concurrency. In S. Abramsky, D. M. Gabbay & T. S. E. Maibaum (Eds.),
Handbook of Logic in Computer Science: vol. 4: Semantic Modelling (pp. 1-148). Oxford University Press.
Nielsen, M., Plotkin, G. & Winskel, G. (1979).
Petri nets, event structures and domains. In G. Kahn (Ed.),
Semantics of Concurrent Computation: Proceedings of the International Symposium, Evian, France, July 2-4, 1979 (pp. 266-284). Springer.
https://doi.org/10.1007/BFb0022474