- https://fr.wikipedia.org/wiki/Henri_Greder
- https://www.mckleinimagedatabase.com/
- http://norbert.opelgt.org/ogtw/site09m.htm
- https://www.pinterest.de
- http://rallymemory.blogspot.com
- http://raceladys.ch
- http://www.slowlysideways.com
- http://www.solitude-historic.de
- https://www.racingsportscars.com
- https://www.opelpost.com
- https://modelcarforum.de
- http://passionnsujcb.canalblog.com/archives/2012/08/20/24926403.html
- http://opelvintageatlantique.fr/Page(12).htm
- https://www.motorsportfotografiebyvit.eu/gallery458190.html?pagination[galleries][458190]=120
- sto-motorsportfotos.de]
- Aus dem Buch: ONLY ONE LIFE, MINE – HENRY E. GREDER / ISBN 978-2-36059005-6
