@InProceedings{von Rickenbach2008Energy-Efficient,
	 author =	{Pascal von Rickenbach},
	 title =	{{Energy-Efficient Data Gathering in Sensor Networks}},
	 booktitle =	{{PhD Thesis, ETH Zurich, Diss. ETH No. 17801}},
	 month =	{May},
	 year =		{2008}
}