@inproceedings{Cristinacce:IFGR2004,
    author = {D. Cristinacce and T. Cootes },
    title  = {A Comparison of Shape Constrained Facial
            Feature Detectors },
    booktitle = {$6^{th}$ International Conference on Automatic
        Face and Gesture  Recognition 2004, Seoul, Korea},
    pages= { 375-380 },
    year = 2004
}