@article{liu2011improved,
  title={An improved particle swarm optimization for feature selection},
  author={Liu, Yuanning and Wang, Gang and Chen, Huiling and Dong, Hao and Zhu, Xiaodong and Wang, Sujing},
  journal={Journal of Bionic Engineering},
  volume={8},
  number={2},
  pages={191--200},
  year={2011},
  publisher={Elsevier}
}