@article {ZRS-JIM-01,
	title = {A Two Phase Optimisation Method for Petri Net Models of Manufacturing Systems},
	journal = {Journal of Intelligent Manufacturing},
	volume = {12},
	year = {2001},
	month = {10},
	pages = {421-432},
	author = {A. Zimmermann and D. Rodr{\'\i}guez and M. Silva}
}

