Heping Wang Xiaobo Zhang Farid Naït-Abdesselam Ashfaq A. Khokhar DPS-MAC: An Asynchronous MAC Protocol for Wireless Sensor Networks. 393-404 2007 conf/hipc/2007 HiPC http://dx.doi.org/10.1007/978-3-540-77220-0_37 db/conf/hipc/hipc2007.html#WangZNK07