@article{han2017space,
  title={Space-time representation of people based on 3D skeletal data: A review},
  author={Han, Fei and Reily, Brian and Hoff, William and Zhang, Hao},
  journal={Computer Vision and Image Understanding},
  volume={158},
  pages={85--105},
  year={2017},
  publisher={Elsevier}
}