RISC RISC Research Institute for Symbolic Computation  
  • @techreport{RISC1842,
    author = {Endre Kiss},
    title = {{A Parallel z-Tree for Computing the Visibility Structure of Segments in the Plane}},
    number = {91-40},
    year = {1991},
    type = {RISC Report Series},
    institution = {Research Institute for Symbolic Computation (RISC), Johannes Kepler University Linz},
    address = {Schloss Hagenberg, 4232 Hagenberg, Austria}
    }