@article {IOPORT.50154250,
    author       = {Zhang, Daqiang and Zhou, Jingyu and Guo, Minyi and Cao, Jiannong and Li, Tianbao},
    title        = {TASA: tag-free activity sensing using RFID tag arrays},
    year         = {2011},
    journal      = {IEEE Trans. Parallel Distrib. Syst.},
    volume       = {22},
    number       = {4},
    pages        = {558-570},
    identifier   = {50154250},
}