@inproceedings {1342,
	title = {Implicit Places in Net Systems},
	booktitle = {IEEE 8th International Workshop on Petri Nets and Performance Models (PNPM{\textquoteright}99)},
	year = {1999},
	month = {09/1999},
	pages = {104-113},
	publisher = {IEEE Computer Society Press},
	organization = {IEEE Computer Society Press},
	address = {Zaragoza, Spain},
	isbn = {0-7695-0331-4},
	author = {F. Garc{\'\i}a-Vall{\'e}s and J.M. Colom},
	editor = {P. Bucholz and M. Silva}
}

