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Physical Review B Physical review / B, 87 87 (2013 2013) 20 20, S. 205132 205132
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Physical Review B Physical review / B, 88 88 (2013 2013) 7 7, S. 075422 075422
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Physical Review B Physical review / B, 88 88 (2013 2013) 23 23, S. 235203 235203
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