- Author: Bernd W. Wirtz
- Language: English
- Year: 2020
- Author: BERND W. WIRTZ
- Language: English
- Year: 2020
- Author: Bernd W. Wirtz
- Language: English
- Year: 2019
- Author: Bernd W. Wirtz
- Language: English
- Author: Bernd W. Wirtz
- Language: English
- Year: 2019
- Author: Univ.-Prof. Dr. Bernd W. Wirtz (auth.)
- Language: German
- Year: 2006
- Author: Bernd W. Wirtz (auth.) Bernd W. Wirtz (eds.)
- Language: German
- Year: 2003