• 

  GFZ Potsdam - Publications

  https://web.archive.org/web/20121014005826/http://www3.gfz-potsdam.de/gfzFrames/extern-publications-authors?authors=Friis-Christensen&fname=E.&lang=en

  GFZ, Publication Information, generated from Data Base Content

• 

  GFZ Potsdam - Publications

  https://web.archive.org/web/20121014005826/http://www3.gfz-potsdam.de/gfzFrames/extern-publications-authors?authors=Friis-Christ

  GFZ, Publication Information, generated from Data Base Content

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