- Author: David W. Tschanz
- Language: English
- Year: 2008
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- Language: English
- Year: 2004
- Author: Rooij Michel de, Wesselius Jaap
- Language: English
- Year: 2014
- Author: Elfassy David
- Language: English
- Year: 2014
- Author: Redmond Tony
- Language: English
- Year: 2001
- Author: Redmond Tony
- Language: English
- Year: 2001
- Author: Joos Thomas
- Language: German
- Year: 2013