@inproceedings{recognitionofnonmanualmarkersinamerican,
  title = {Recognition of Nonmanual Markers in American Sign Language (ASL) Using Non-Parametric Adaptive 2D-3D Face Tracking},
  author = {Dimitris Metaxas and Bo Liu and Fei Yang and Peng Yang and Nicholas Michael and Carol Neidle},
  year = {2012},
  booktitle = {LREC 2012 5},
  url = {https://aclanthology.org/L12-1123},
}