@misc {IOPORT.70636899,
    author       = {Soyel, Hamit and Demirel, Hasan},
    title        = {Improved SIFT matching for pose robust facial expression recognition},
    howpublished = {FG, 585-590 (2011).},
    year         = {2011},
    doi          = {10.1109/FG.2011.5771463},
    identifier   = {70636899},
}