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Physical review letters, 118 (2017) 23, S. 238001
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EPL (Europhysics Letters) epl, 119 119 (2017 2017) 1 1, S. 18002 18002
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EPL (Europhysics Letters) epl, 120 120 (2017 2017) 3 3, S. 36002 36002
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