@article {1970941,
	title = {A Fuzzy Directed Graph-based QoS Model for Service Composition},
	journal = {Wuhan University Journal of Natural Sciences},
	volume = {12},
	year = {2007},
	month = {2007},
	keywords = {BIS, Business Analytics},
	author = {Sanjun,G. and Wanchun,D. and Fan,Shaokun}
}
