@article{qu2017cas,
  title={CAS (ME) $\^{} 2$: a database for spontaneous macro-expression and micro-expression spotting and recognition},
  author={Qu, Fangbing and Wang, Su-Jing and Yan, Wen-Jing and Li, He and Wu, Shuhang and Fu, Xiaolan},
  journal={IEEE Transactions on Affective Computing},
  volume={9},
  number={4},
  pages={424--436},
  year={2017},
  publisher={IEEE}
}