Maude Manouvrier Marta Rukoz Geneviève Jomier Quadtree representations for storage and manipulation of clusters of images. 513-527 2002 20 Image Vision Comput. 7 http://dx.doi.org/10.1016/S0262-8856(02)00027-6 db/journals/ivc/ivc20.html#ManouvrierRJ02