@InProceedings{Goussevskaia2007layers,
	author=	{Olga Goussevskaia and Michael Kuhn and Roger Wattenhofer},
	title=	{{Layers and Hierarchies in Real Virtual Networks}},
	booktitle=	{{EEE/WIC/ACM International Conference on Web Intelligence (WI), Silicon Valley, California, USA}},
	month=	{November},
	year=	{2007},
}