@inbook {259,
	title = {Improving Throughput Upper Bounds for Net Based Models},
	booktitle = {Robotics and Flexible Manufacturing Systems},
	year = {1992},
	pages = {281-294},
	publisher = {Elsevier Science Publishers B.V. (North Holland)},
	organization = {Elsevier Science Publishers B.V. (North Holland)},
	address = {Amsterdam, The Netherlands},
	isbn = {0-444-89705-4},
	author = {J. Campos and J.M. Colom and M. Silva},
	editor = {S.G. Tzafestas and J.C. Gentina}
}

