@article{hu2015cell,
  title = {Cell-based visual surveillance with active cameras for 3D human gaze computation},
  author = {Hu, Zhaozheng and Matsuyama, Takashi and Nobuhara, Shohei},
  journal = {Multimedia Tools and Applications},
  volume = {74},
  number = {11},
  pages = {4161--4185},
  year = {2015},
  month = dec,
  publisher = {Springer US},
  pdf = {http://dx.doi.org/10.1007/s11042-013-1816-y}
}