@article{5639,
  author       = {Cottin, Claudia},
  issn         = {1432-1823},
  journal      = {Mathematische Zeitschrift},
  number       = {1},
  pages        = {69--83},
  publisher    = {Springer Science and Business Media LLC},
  title        = {{Mixed K-functionals: A measure of smoothness for blending-type approximation}},
  doi          = {10.1007/BF02570860},
  volume       = {204},
  year         = {1990},
}

@inproceedings{5657,
  author       = {Cottin, Claudia},
  booktitle    = {Approximation Theory VI, Proc. Conf. College Station (Texas)},
  editor       = {Chui, C. K. and Schumaker, Larry L. and Ward, J. D. },
  location     = {Texas A & M University},
  pages        = {149--152},
  publisher    = {Academic Press},
  title        = {{Inverse theorems for blending-type approximation}},
  year         = {1989},
}

@article{5653,
  author       = {Badea, C. and Badea, Irinel Adriana and Cottin, Claudia},
  journal      = {Revue d'Analyse Numérique et de la Théorie de l'Approximation},
  pages        = {7--17},
  title        = {{A Korovkin-type theorem for generalizations of Boolean sum operators and approximation by trigonometric pseudopolynomials}},
  volume       = {17},
  year         = {1988},
}

@phdthesis{5691,
  author       = {Cottin, Claudia},
  title        = {{Quantitative Aussagen zur Blending-Typ-Approximation}},
  year         = {1988},
}

@article{5645,
  author       = {Badea, Catalin and Badea, Ioan and Cottin, Claudia and Gonska, Heinz H.},
  journal      = {Journal of Approximation Theory and its Applications},
  pages        = {95--108},
  title        = {{Notes on degree of approximation of B-continuous and B-differentiable functions.}},
  volume       = {4},
  year         = {1988},
}

@article{4779,
  author       = {Vassilevski, P. S. and Petrova, Svetozara},
  journal      = {Comptes Rendus de l’Academie Bulgare des Sciences},
  number       = {7},
  pages        = {33--36},
  title        = {{A note on construction of preconditioners in solving 3D elliptic problems by substructuring}},
  volume       = {41},
  year         = {1988},
}