@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},
}