"Ilios-Fotodesign". Günter Kraus Schmuck (in German). Ilios-Fotodesign. pp. 21–22. Archived from the original(Katalog) on January 26, 2016. Retrieved February 29, 2016.
Gecko Photographers (July 2004). "RedBox"(PDF). RedBox.de (in German). New Business Verlag GmbH & Co. KG. p. 4. Archived from the original(PDF) on March 4, 2016. Retrieved March 21, 2016.
Röhm Verlag und Medien GmbH & Co. KG (July 5, 2011). "Bilder, die den Mythos schaffen". www.szbz.de (in German). Archived from the original on March 4, 2016. Retrieved March 2, 2016.
"Ilios-Fotodesign". Günter Kraus Schmuck (in German). Ilios-Fotodesign. pp. 21–22. Archived from the original(Katalog) on January 26, 2016. Retrieved February 29, 2016.
Gecko Photographers (July 2004). "RedBox"(PDF). RedBox.de (in German). New Business Verlag GmbH & Co. KG. p. 4. Archived from the original(PDF) on March 4, 2016. Retrieved March 21, 2016.
Röhm Verlag und Medien GmbH & Co. KG (July 5, 2011). "Bilder, die den Mythos schaffen". www.szbz.de (in German). Archived from the original on March 4, 2016. Retrieved March 2, 2016.