@article{Farouki-Sakkalis-PH-first-90,
  volume = {34},
  number = {5},
  mrnumber = {MR1084084 (92a:65063)},
  issn = {0018-8646},
  author = {Farouki, Rida T. and Sakkalis, Takis},
  mrclass = {65D17 (53A04)},
  fjournal = {International Business Machines Corporation. Journal of Research
              and Development},
  coden = {IBMJAE},
  title = {Pythagorean hodographs},
  pages = {736--752},
  journal = {IBM J. Res. Develop.},
  year = {1990},
}