"Grüne DirektkandidatInnen in Bochum"Archived 2012-03-03 at the Wayback Machine (PDF) in Grünspecht 49. ("Green Party direct candidates in Berlin") Bündnis 90/Die Grünen Kreisverband Bochum (September 1998). Retrieved February 21, 2010 (in German)
"Grüne DirektkandidatInnen in Bochum"Archived 2012-03-03 at the Wayback Machine (PDF) in Grünspecht 49. ("Green Party direct candidates in Berlin") Bündnis 90/Die Grünen Kreisverband Bochum (September 1998). Retrieved February 21, 2010 (in German)