@article{zheng_li_2014, 
  title={Towards More Efficient Cardinality Estimation for Large-Scale RFID Systems}, 
  volume={22}, 
  DOI={10.1109/tnet.2013.2288352}, 
  publisher={Institute of Electrical and Electronics Engineers (IEEE)}, 
  author={Zheng and Li}, 
  year={2014}
  }