@article{af-rrkt-89,
    author = "Akman, Varol and Franklin, Wm Randolph",
    title = "Ray Representation for K-d Trees",
    journal = "Pattern Recognition Letters",
    month = "November",
    year = "1989",
    pages = "315--320",
    href = "\bibhref{66-prl89-ray}",
    mykey = "akman",
    keywords = "oct trees, measure, rays"
}