- Author: Donald Voet, Juudith G. Voet, Charlotte W. Pratt, Annete G. Beck-Sickinger, Ulrich Hahn, Bärbel Häcker, Otmar Asperger, Regula von Eggelkraut-Gottanka, Norman Koglin, Ulrike Krauss, Michael Langer, Maria Ludewig, Michael Richter
- Language: German
- Year: 2010
- Author: Charlotte W. Pratt Kathleen Cornely
- Language: English
- Year: 2021
- Author: Judith G. Voet, Donald Voet, Charlotte W. Pratt
- Language: English
- Year: 2016
- Author: Charlotte W. Pratt, Kathleen Cornely
- Language: English
- Year: 2018
- Author: Donald Voet Judith G Voet Charlotte W Pratt
- Language: Italian
- Year: 2017
- Author: Kathleen Cornely, Charlotte W. Pratt
- Language: English
- Year: 2018
- Author: Donald Voet Judith G. Voet Charlotte W. Pratt
- Language: English
- Year: 2016
- Author: Donald Voet Judith G. Voet Charlotte W. Pratt
- Language: English
- Year: 2012
- Author: Donald Voet Judith G. Voet Charlotte W. Pratt
- Language: English
- Year: 2008
