@misc {IOPORT.70819447,
    author       = {Liu, Yunhuai and Zhang, Qian and Ni, Lionel M.},
    title        = {Opportunity-based topology control in wireless sensor networks},
    howpublished = {ICDCS, 421-428 (2008).},
    year         = {2008},
    doi          = {10.1109/ICDCS.2008.91},
    identifier   = {70819447},
}