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- Language: German
- Year: 2014
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- Year: 2018
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- Year: 2014
- Author: Zöpfl Andreas
- Language: German
- Year: 2003
- Author: Yang Shang-Ju
- Language: German
- Year: 2015
- Author: Wöller Andreas
- Language: German
- Year: 2016
- Author: Breschendorf Peter
- Language: German
- Year: 2009
- Author: Krumbiegel Peter
- Language: German
- Year: 1975