@Phdthesis{wu-phd,
    author = "Wu, Peter Yick Fai",
    title = "Polygon Overlay in Prolog",
    school = "Electrical, Computer, and Systems Engineering Dept., Rensselaer Polytechnic Institute",
    mykey = "theses over",
    fulltext = "https://wrfranklin.org/theses/wu-phd.pdf",
    year = "1987"
}