@TechReport{SCI:Hij2008a,
  author =    "Y. Hijazi and A. Knoll and M. Schott and A.
              Kensler and C.D. Hansen and H. Hagen",
  title =     "CSG Operations of Arbitrary Primitives with
              Interval Arithmetic and Real-Time Ray Tracing",
  number =    "UUSCI-2008-008",
  year =      "2008",
  institution = "University of Utah School of Computing",
  type =      "SCI Technical Report",
  url =       "http://www.sci.utah.edu/publications/SCITechReports/UUSCI-2008-008.pdf",
}