@inproceedings{wang06boundary,
    author="Yue Wang and Jie Gao and Joseph S. B. Mitchell",
    title="Boundary Recognition in Sensor Networks by Topological Methods",
    booktitle="Proc. of the ACM/IEEE International Conference on Mobile Computing and Networking (MobiCom)",
    pages="122--133",
    month="September",
    year="2006"
}