@InProceedings{Sommer2008Symmetric,
	 author =	{Philipp Sommer and Roger Wattenhofer},
	 title =	{{Symmetric Clock Synchronization in Sensor Networks}},
	 booktitle =	{{ACM Workshop on Real-World Wireless Sensor Networks (REALWSN), Glasgow, Scotland, UK}},
	 month =	{April},
	 year =		{2008}
}