@incollection{Farouki-PH-handbook-2002,
  mrnumber = {MR1928550},
  author = {Farouki, Rida T.},
  mrclass = {68U05},
  booktitle = {Handbook of computer aided geometric design},
  address = {Amsterdam},
  title = {Pythagorean-hodograph curves},
  publisher = {North-Holland},
  year = {2002},
  pages = {405--427},
}