@inproceedings{dbruling,
    author="Rik Sarkar and Xianjin Zhu and Jie Gao",
    title="Double Rulings for Information Brokerage in Sensor Networks",
    booktitle="Proc. of the ACM/IEEE International Conference on Mobile Computing and Networking (MobiCom)",
    month="September",
    year="2006"
}