@InProceedings{Wattenhofer2004counting,
	 author =	{Roger Wattenhofer and Peter Widmayer},
	 title =	{{The counting pyramid: an adaptive distributed counting scheme}},
	 booktitle =	{{Journal of Parallel and Distributed Computing, Volume 64, Issue 4. Elsevier}},
	 month =	{April},
	 year =		{2004}
}