@article{HaSt03d,
	author = {Hausheer, David and Stiller, Burkhard},
	journal = {Praxis der Informationsverarbeitung und Kommunikation (PIK)},
	month = {sep},
	number = {3},
	pages = {173},
	title = {Economics of Peer-to-Peer Systems},
	url = {http://hausheer.osola.com/publications/pik.pdf},
	volume = {26},
	year = {2003}
}