- Author: Darkow Inga-Lena, Hartmann Evi, Schober Holger, Walter Stefan, Jahns Christopher
- Language: German
- Year: 2006
- Author: Peter Claus Hartmann
- Language: German
- Year: 2001
- Author: Thomas Krobath, Andrea Lehner-Hartmann, Regina Polak
- Language: German
- Year: 2013
- Author: Andrea Lehner-Hartmann, Thomas Krobath, Karin Peter, Martin Jäggle
- Language: German
- Year: 2018
- Author: Thomas Felix Hartmann
- Language: German
- Year: 2017
- Author: Markus Götz, Christian Hartmann
- Year: 2021
- Author: Hans-Peter Hartmann, Martin Urban
- Language: German
- Year: 2005
- Author: Florian Hartmann
- Language: German
- Year: 2016
- Author: Martina Hartmann, Claudia Märtl
- Language: German
- Year: 2013