@article{Bangert-Prautzsch-quadric-splines-99,
  volume = {16},
  number = {6},
  mrnumber = {MR1703961 (2001b:65026)},
  issn = {0167-8396},
  author = {Bangert, Claudia and Prautzsch, Hartmut},
  mrclass = {65D17 (65D05 65D07)},
  fjournal = {Computer Aided Geometric Design},
  mrreviewer = {Juan Jos{\'e} Torrens},
  coden = {CAGDEX},
  title = {Quadric splines},
  journal = {Comput. Aided Geom. Design},
  year = {1999},
  pages = {497--515},
}