Goos, Hauke (16 June 2003). "Stirb langsam" [Die Hard]. Der Spiegel (in German). Archived from the original on 12 September 2018. Retrieved 24 April 2014.
Goos, Hauke (16 June 2003). "Stirb langsam" [Die Hard]. Der Spiegel (in German). Archived from the original on 12 September 2018. Retrieved 24 April 2014.