@entry{kno-hij-ken-sch-han-hag-07-aa-gpuray,
  author = {A Knoll and Y Hijazi and A Kensler and M Schott...},
  title = {Fast and robust ray tracing of general implicits on the gpu},
  journal = {University of Utah ...,},
  volume = {},
  number = {},
  pages = {},
  year = 2007,
  month = ,
  doi = {},
  comment = {},
  abstract = {},
  url = {{\url{https://www.sci.utah.edu/publications/SCITechReports/UUSCI-2007-014.pdf}}},
  quotes = {... The major contributions of this paper are a new iterative spatial traversal algorithm for implicit intersection; and an efficient implementation of a correct reduced affine arithmetic (RAA) ...}
}