@InProceedings{Lenzen2009Optimal,
	 author =	{Christoph Lenzen and Philipp Sommer and Roger Wattenhofer},
	 title =	{{Optimal Clock Synchronization in Networks}},
	 booktitle =	{{7th ACM Conference on Embedded Networked Sensor Systems (SenSys), Berkeley, California, USA}},
	 month =	{November},
	 year =		{2009}
}