@INPROCEEDINGS{Efremov2005sccg,
  AUTHOR = {Efremov, Alexander and Havran, Vlastimil and Seidel, Hans-Peter},
  EDITOR = {Juettler, Bert},
  TITLE = {Robust and Numerically Stable Bezier Clipping Method for Ray Tracing NURBS Surfaces},
  BOOKTITLE = {21st Spring Conference on Computer Graphics (SCCG 2005)},
  PUBLISHER = {ACM},
  YEAR = {2005},
  TYPE = {http://www.acm.org},
  ORGANIZATION = {ACM SIGGRAPH and EUROGRAPHICS},
  PAGES = {123--131},
  ADDRESS = {Budmerice, Slovakia},
  ISBN = {80-223-2057-9},
}