@misc{gom-sto-00-appr-f,
  author = {Anamaria Gomide and Jorge Stolfi},
  title = {Non-Homogeneous Spline Bases for Approximation on the Sphere},
  howpublished = {Unpublished manuscript},
  year = 2000,
  month = jul,
  note = {Final version of~\cite{gom-sto-99-appr}, submitted for the 4th International Conference on Curves and Surfaces, not accepted.}
}