@inproceedings{sparse07gao,
	author="Jie Gao and Leonidas J. Guibas and John Hershberger and Nikola Milosavljevic",
	title="Sparse Data Aggregation in Sensor Networks",
	booktitle="Proc. of the International Conference on Information Processing in Sensor Networks (IPSN'07)",
	pages="430--439",
	month="April",
	year="2007"
}