@INPROCEEDINGS{Feris01efficientreal-time,
    author = {Rogério S. Feris and Roberto M. Cesar and Jr. and Volker Krueger},
    title = {Efficient Real-Time Face Tracking in Wavelet Subspace},
    booktitle = {In Proceedings of the Int. Workshop on Recognition, Analysis and Tracking of Faces and Gestures in Real-Time Systems},
    year = {2001},
    pages = {113--118}
}