- Author: Walter Ruf, Thomas Fittkau
- Language: German
- Year: 2007
- Author: Walter J Thomas, Robert Grimes
- Language: English
- Year: 2020
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- Language: English
- Year: 2012
- Author: Doberenz Walter, Gewinnus Thomas
- Language: German
- Year: 2013
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- Year: 2013
- Author: Walter Carlsnaes Thomas Risse Beth A Simmons
- Language: English
- Year: 2013
- Author: Walter Brenner Thomas Hess (eds.)
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- Year: 2014
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- Language: English
- Year: 2002