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@ARTICLE{Krcher:686507,
      author       = {Kärcher, Mark and Boyaval, Sébastien and Grepl, Martin A.
                      and Veroy-Grepl, Karen},
      title        = {{R}educed basis approximation and a posteriori error bounds
                      for 4{D}-{V}ar data assimilation},
      volume       = {463},
      reportid     = {RWTH-2017-02880},
      series       = {Preprint / Institut für Geometrie und Praktische
                      Mathematik der Rheinisch-Westfälischen Technischen
                      Hochschule Aachen},
      pages        = {29 Seiten},
      year         = {2017},
      cin          = {112620 / 110000 / 080003},
      cid          = {$I:(DE-82)112620_20140620$ / $I:(DE-82)110000_20140620$ /
                      $I:(DE-82)080003_20140620$},
      typ          = {PUB:(DE-HGF)25},
      url          = {https://publications.rwth-aachen.de/record/686507},
}