@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}
}