@inbook {ICSilv87,
	title = {Towards a Synchrony Theory for P/T Nets},
	booktitle = {Concurrency and Nets},
	year = {1987},
	pages = {435-460},
	publisher = {Springer-Verlag},
	organization = {Springer-Verlag},
	author = {M. Silva},
	editor = {K. Voss and H. Genrich and G. Rozenberg}
}

