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@ARTICLE{Hennig:133736,
      author       = {Hennig, Alexander and Niemann-Delius, Christian and
                      Skrypzak, Thorsten},
      title        = {{H}ard rock mining the opencast way versus a combination of
                      opencast and deep mining methods : an energy balance sheet},
      journal      = {Glückauf-Mining-Reporter},
      volume       = {1},
      number       = {April},
      issn         = {0176-4101},
      address      = {Essen},
      publisher    = {VGE-Verl.},
      reportid     = {RWTH-CONV-014790},
      pages        = {37-41},
      year         = {2010},
      subtyp        = {Editorial},
      cin          = {511410 / 510000},
      cid          = {$I:(DE-82)511410_20140620$ / $I:(DE-82)510000_20140620$},
      typ          = {PUB:(DE-HGF)16},
      url          = {https://publications.rwth-aachen.de/record/133736},
}