@article{Ahn-Kim-Helix-05,
  volume = {20},
  number = {4},
  mrnumber = {MR2175532 (2006h:65014)},
  issn = {1225-1763},
  author = {Ahn, Young-Joon and Kim, Philsu},
  mrclass = {65D17 (41A15 65D07)},
  fjournal = {Korean Mathematical Society. Communications},
  mrreviewer = {Adam Coffman},
  title = {Error analysis for approximation of helix by bi-conic and
           bi-quadratic {B}ezier curves},
  pages = {861--873},
  journal = {Commun. Korean Math. Soc.},
  year = {2005},
}