@inproceedings{sarkar08contour, author="Rik Sarkar and Xianjin Zhu and Jie Gao and Leonidas J. Guibas and Joseph S. B. Mitchell", title="Iso-Contour Queries and Gradient Descent with Guaranteed Delivery in Sensor Networks", booktitle="Proc. of the 27th Annual IEEE Conference on Computer Communications (INFOCOM'08)", month="May", year="2008" }