@article {IOPORT.50088819,
    author       = {Samet, Hanan and Webber, Robert E.},
    title        = {Storing a collection of polygons using quadtrees},
    year         = {1985},
    journal      = {ACM Trans. Graph.},
    volume       = {4},
    number       = {3},
    pages        = {182-222},
    doi          = {10.1145/282957.282966},
    identifier   = {50088819},
}