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@PHDTHESIS{Trebels:1026182,
      author       = {Trebels, Walter},
      othercontributors = {Butzer, P. L. and Nessel, R. J.},
      title        = {{M}ultipliers for ({C}, alpha)-bounded {F}ourier expansions
                      in {B}anach spaces and approximation theory},
      school       = {Aachen, Techn. Hochsch.},
      type         = {Habilitationsschrift},
      address      = {Aachen},
      reportid     = {RWTH-2026-00719},
      pages        = {V, 103 S.},
      year         = {1973},
      note         = {Von der Mathematisch-Naturwissenschaftlichen Fakultät der
                      Rheinisch-Westfälischen Technischen Hochschule Aachen
                      genehmigte Habilitationsschrift zur Erlangung der venia
                      legendi; Habilitationsschrift, Aachen, Techn. Hochsch.,
                      1973},
      cin          = {hsbk000000},
      ddc          = {510},
      cid          = {$I:(DE-82)hsbk000000_20140620$},
      typ          = {PUB:(DE-HGF)13},
      url          = {https://publications.rwth-aachen.de/record/1026182},
}