@TechReport{SCI:Ken2008a,
  author =    "A. Kensler and A. Knoll and P. Shirley",
  title =     "Better Gradient Noise",
  number =    "UUSCI-2008-001",
  year =      "2008",
  institution = "University of Utah",
  type =      "{SCI} Institute Technical Report",
  keywords =  "ray tracing RT",
  url =       "http://www.sci.utah.edu/publications/SCITechReports/UUSCI-2008-001.pdf",
}