@inproceedings{5658,
  author       = {Cottin, Claudia},
  booktitle    = {Function Spaces, Proc. Conf. Poznan 1989},
  pages        = {152--161},
  publisher    = {Teubner},
  title        = {{Approximation by bounded pseudo-polynomials}},
  year         = {1991},
}

@inproceedings{5738,
  author       = {Anastassiou, Claudia and Cottin, Claudia and Gonska, Heiner},
  booktitle    = {Israel Mathematical Conference Proceedings, Vol. IV},
  editor       = {Baron, S. and Leviatan, D.},
  pages        = {31--44},
  title        = {{Global smoothness preservation by multivariate approximation operators}},
  year         = {1991},
}

@article{4480,
  author       = {Anastassiou, George A. and Cottin, Claudia and Gonska, Heinz H.},
  issn         = {2196-6753},
  journal      = {Analysis},
  number       = {1},
  publisher    = {Walter de Gruyter GmbH},
  title        = {{Global smoothness of approximating functions}},
  doi          = {10.1524/anly.1991.11.1.43},
  volume       = {11},
  year         = {1991},
}