
- Author: Dr. Ingmar Lehmann Prof. Dr. Wolfgang Schulz (auth.)
- Language: German
- Year: 1997

- Author: Alfred S. Posamentier Ingmar Lehmann
- Language: English
- Year: 2004

- Author: Alfred S. Posamentier Ingmar Lehmann
- Language: English
- Year: 2007

- Author: Alfred S. Posamentier Ingmar Lehmann
- Language: English
- Year: 2004

- Author: Alfred S. Posamentier Ingmar Lehmann
- Language: English
- Year: 2004

- Author: Alfred S. Posamentier Ingmar Lehmann
- Language: English
- Year: 2009

- Author: Alfred S. Posamentier Ingmar Lehmann
- Language: English
- Year: 2007

- Author: Alfred S. Posamentier Ingmar Lehmann
- Language: English
- Year: 2004

- Author: Alfred S. Posamentier Ingmar Lehmann
- Language: English
- Year: 2007