@article{chacon2007fuzzy,
  title={A Fuzzy Clustering Approach for Face Recognition Based on Face Feature Lines and Eigenvectors.},
  author={Chacon M., Mario I. and Rivas-Perea, Pablo and Ramirez A., Graciela},
  journal={Engineering Letters},
  volume={15},
  number={1},
  month={August},
  year={2007}
}