- Author: Wolfgang von Gahlen-Hoops
- Language: German
- Year: 2014
- Author: B. Hoops, E.J. Marais, H. Mostert, J.A.M.A. Sluysmans, L.C.A. Verstappen
- Language: English
- Year: 2015
- Author: B. Hoops, E.J. Marais, H. Mostert, J.A.M.A. Sluysmans, L.C.A. Verstappen
- Language: English
- Year: 2015
- Author: Wolfgang von Gahlen-Hoops (editor), Katharina Genz (editor)
- Language: German
- Year: 2023
- Author: Andreas Heusler (editor), Johannes Hoops (editor), Paul Zimmermann (editor)
- Language: German
- Year: 1902
- Author: Johannes Hoops
- Language: German
- Year: 1905
- Author: Johannes Hoops
- Language: German