1. Billington, J.: Extensions to Coloured Petri Nets and their Application to Protocols. PhD thesis, University of Cambridge, Computer Laboratory (May 1990);
2. Published as Technical Report No. 222 (May 1991)
3. Lecture Notes in Computer Science;J. Billington,2003
4. Lecture Notes in Computer Science;J. Billington,2004
5. Billington, J., Han, B.: Formalising TCP’s Data Transfer Service Language: A Symbolic Automaton and its Properties. Fundamenta Informaticae 80(1-3), 49–74 (2007)