@article{Pinkus03,
  title = {Negative Theorems in Approximation Theory},
  author = {Allan Pinkus},
  year = {2003},
  url = {http://www.jstor.org/stable/3647961},
  researchr = {https://researchr.org/publication/Pinkus03},
  cites = {0},
  citedby = {0},
  journal = {The American Mathematical Monthly},
  volume = {110},
  number = {10},
  pages = {900-911},
}