- Author: Matthias C. Kettemann
- Language: English
- Year: 2013
- Author: Wolfgang Benedek, Matthias C. Kettemann
- Language: English
- Year: 2020
- Author: Matthias C Kettemann, Konrad Lachmayer (editors)
- Language: English
- Year: 2022
- Author: Matthias C Kettemann Konrad Lachmayer
- Language: English
- Year: 2022
- Author: Matthias C. Kettemann Alexander Peukert Indra Spiecker gen. Döhmann
- Language: English
- Year: 2022
- Author: Matthias C. Kettemann
- Language: English
- Year: 2020
- Author: Mag. Matthias C. Kettemann (auth.) Dr. Otto Kammerlander (eds.)
- Language: German
- Year: 2012