@article{
    IJPRAI2007,
    author = "Yang, Zhirong and Yuan, Zhijian and Laaksonen, Jorma",
    responsibleauthor = "Yang, Zhirong",
    picsom = "+jorma rozyang",
    title = "Projective Non-negative Matrix Factorization with Applications to Facial Image Processing",
    journal = "International Journal on Pattern Recognition and Artificial Intelligence",
    number = "8",
    month = "December",
    volume = "21",
    flags = "AIRC CBIR",
    year = "2007",
    pages = "1353-1362"
}