@article{Pieper2009,
  author    = {Pieper, Martin},
  title     = {Vector hyperinterpolation on the sphere},
  series = {Journal of approximation theory. 156 (2009), H. 2},
  journal   = {Journal of approximation theory. 156 (2009), H. 2},
  isbn      = {0021-9045},
  pages     = {173 -- 186},
  year      = {2009},
  language  = {en}
}