@incollection{Morken-93-Parametric-Parabola,
  mrnumber = {MR1356983 (96h:65023)},
  author = {M{\o}rken, Knut},
  mrclass = {65D17},
  booktitle = {Mathematical methods for curves and surfaces (Ulvik, 1994)},
  address = {Nashville, TN},
  title = {Parametric interpolation by quadratic polynomials in the plane},
  publisher = {Vanderbilt Univ. Press},
  year = {1995},
  pages = {385--402},
}