Blinn99b'

@article{DBLP:journals/cga/Blinn99b,
  author    = {James F. Blinn},
  title     = {How Many Different Parametric Cubic Curves Are There? Part
               2: The "Same" Game},
  journal   = {IEEE Computer Graphics and Applications},
  volume    = {19},
  number    = {6},
  year      = {1999},
  pages     = {88-92},
  ee        = {http://doi.ieeecomputersociety.org/10.1109/38.799760},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}