frank showcases (in de) (PDF) 18/19. Frank Europe GmbH. Retrieved on 2012-02-20.* 2013-05-11: New URL
precision german engineering for museum display showcases (in en). Frank Europe GmbH. Retrieved on 2012-02-20.Name and license in the popup window. similar page, 3rd image
Funktion und Design in Perfektion für Museen und Ausstellungen (in de). Frank Europe GmbH. Retrieved on 2012-03-15.Name and license in the popup window. Collage in the slideshow too
frank showcase system (in de) (PDF) 26. Frank Europe GmbH. Retrieved on 2013-05-11.