@inproceedings{MichaelisHerpersWittaetal.1997,
  author    = {Markus Michaelis and Rainer Herpers and Lars Witta and Gerald Sommer},
  title     = {Hierarchical Filtering Scheme for the Detection of Facial Keypoints},
  series = {ICASSP '97: Proceedings of the 1997 IEEE International Conference on Acoustics, Speech, and Signal Processing, Vol. 4},
  publisher = {IEEE},
  isbn      = {0-8186-7919-0},
  doi       = {10.1109/ICASSP.1997.595306},
  pages     = {2541},
  year      = {1997},
  language  = {en}
}