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@ARTICLE{Kluge:54874,
      author       = {Kluge, Heinz-Jürgen and Block, Michael and Herfurth,
                      Frank},
      title        = {{C}ollimated-hole structures as efficient differential
                      pumping barrier, one-way valve and tool for aligning
                      {P}enning traps},
      journal      = {Hyperfine interactions},
      volume       = {199},
      number       = {1-3},
      issn         = {1572-9540},
      address      = {Dordrecht [u.a.]},
      publisher    = {Springer Science + Business Media B.V},
      reportid     = {GSI-2013-05574},
      pages        = {321 - 326},
      year         = {2011},
      cin          = {ATP / SHP},
      ddc          = {530},
      cid          = {I:(DE-Ds200)ATP-20051214OR020 /
                      I:(DE-Ds200)SHP-20080822OR107},
      pnm          = {533 - Exotic Nuclei and Nuclear Astrophysics (ENNA)
                      (POF2-533)},
      pid          = {G:(DE-HGF)POF2-533},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000313420300033},
      doi          = {10.1007/s10751-011-0327-3},
      url          = {https://repository.gsi.de/record/54874},
}