"Stand: November 2000" (in German). Verband der Unterhaltungssoftware Deutschland. Archived from the original on December 9, 2000. Retrieved August 11, 2019.
"Zeitraum: Januar 2001" (in German). Verband der Unterhaltungssoftware Deutschland. Archived from the original on February 7, 2001. Retrieved August 11, 2019.
"Stand: November 2000" (in German). Verband der Unterhaltungssoftware Deutschland. Archived from the original on December 9, 2000. Retrieved August 11, 2019.
"Zeitraum: Januar 2001" (in German). Verband der Unterhaltungssoftware Deutschland. Archived from the original on February 7, 2001. Retrieved August 11, 2019.