@article{JMLR:v13:cooper12a,
  author  = {Helen Cooper and Eng-Jon Ong and Nicolas Pugeault and Richard Bowden},
  title   = {Sign Language Recognition using Sub-Units},
  journal = {Journal of Machine Learning Research},
  year    = {2012},
  volume  = {13},
  number  = {72},
  pages   = {2205--2231},
  url     = {http://jmlr.org/papers/v13/cooper12a.html}
}