@article{
    NN2008,
    author = "Yang, Zhirong and Laaksonen, Jorma",
    responsibleauthor = "Yang, Zhirong",
    picsom = "+jorma rozyang",
    title = "Principal Whitened Gradient for Information Geometry",
    journal = "Neural Networks",
    number = "2-3",
    volume = "21",
    flags = "AIRC CBIR",
    year = "2008",
    internalpdf = "nn2008.pdf",
    impactfactor = "A",
    pages = "232-240"
}