@conference{7d721b57cd,
	address = {CSG@IFI, University of Züich},
	author = {Stiller, B.},
	booktitle = {IEEE Distingushed Experts Presentation},
	howpublished = {University of Waterloo, Canada},
	month = {may},
	title = {Accounting and Charging for IP Services},
	year = {2007}
}