Palamidessi, Catuscia (1997). "Comparing the expressive power of the Synchronous and the Asynchronous pi-calculus". Proceedings of the 24th ACM Symposium on Principles of Programming Languages: 256–265. arXiv:cs/9809008. Bibcode:1998cs........9008P.
Dam, Mads (1997). "On the Decidability of Process Equivalences for the pi-Calculus". Theoretical Computer Science. 183 (2): 215–228. doi:10.1016/S0304-3975(96)00325-8.
A Calculus of Mobile Processes part 1 page 10, by R. Milner, J. Parrow and D. Walker published in Information and Computation 100(1) pp.1-40, Sept 1992
Palamidessi, Catuscia (1997). "Comparing the expressive power of the Synchronous and the Asynchronous pi-calculus". Proceedings of the 24th ACM Symposium on Principles of Programming Languages: 256–265. arXiv:cs/9809008. Bibcode:1998cs........9008P.