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1“...University of Bern, Physics Institute/University of Bern, Physics Institute...”
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2by Sigfus J. Johnsen, Niels S. Gundestrup, Steffen B. Hansen, Jakob Schwander, Heinrich Rufli“...University of Copenhagen/University of Copenhagen/University of Copenhagen/University of Bern...”
Published 1994
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3“...University of Copenhagen/University of Copenhagen/University of Bern...”
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