@article{zhang19tmcnavigation,
  author = {Zhang, Zhenyong and He, Shibo and Shu, Yuanchao and Shi, Zhiguo},
  title = {{A Self-Evolving WiFi-based Indoor Navigation System Using Smartphones}},
  journal = {IEEE Transactions on Mobile Computing},
  year={2020}, 
  volume={19}, 
  number={8}, 
  pages={1760-1774},
}