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@misc{Balderjahn1995,
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@misc{Richter2002,
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@misc{Richter1998,
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@misc{Daviter2013,
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@misc{Richter2003,
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@misc{Isele2001,
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  author    = {Richter, Martin},
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@misc{Richter2003,
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@misc{Richter1991,
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@misc{Richter1994,
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