- vom 6.12.2023
The behavioral economics of John Maynard Keynes
Wuppertal : Bergische Universität Wuppertal, September 2018
Between facts and perceptions
the area close to school as a context factor in school leadershipWuppertal : Bergische Univ. Wuppertal, 2015
- vom 5.12.2023
A bibliometric based review on social entrepreneurship and its establishment as a field of research
Wuppertal : Bergische Univ. Wuppertal, 2013
- vom 3.3.2022

- vom 14.7.2021

- vom 13.7.2021


- vom 25.4.2021
The beginning of German immigration in North America during the Thirty Years War
"Those damn' Dutch"1996

- vom 21.12.2020

