@article {IOPORT.50087010,
    author       = {Dowson, Nicholas D. H. and Kadir, Timor and Bowden, Richard},
    title        = {Estimating the joint statistics of images using nonparametric windows with application to registration using mutual information},
    year         = {2008},
    journal      = {IEEE Trans. Pattern Anal. Mach. Intell.},
    volume       = {30},
    number       = {10},
    pages        = {1841-1857},
    identifier   = {50087010},
}