- Author: Klein Eckart, Eckart Karl
- Language: German
- Year: 1996
- Author: Eckart Karl, Marcinek Joachim, Viehrig Hans
- Language: German
- Year: 1993
- Author: Eckart Karl, Tzschaschel Sabine
- Language: German
- Year: 2000
- Author: Eckart Karl, Hacker Jens, Mampel Siegfried
- Language: German
- Year: 1998
- Author: Eckart Karl
- Language: German
- Year: 1995
- Author: Eckart Karl, Roesler Jörg
- Language: German
- Year: 1999
- Author: Eckart Karl, Jenkis Helmut
- Language: German
- Year: 2001
- Author: Eckart Karl, Roch Isolde
- Language: German
- Year: 1993
- Author: Eckart Karl, Kehrer Gerhard, Scherf Konrad
- Language: German
- Year: 1998
- Author: Eckart Karl, Paraskewopoulos Spiridon
- Language: German
- Year: 1997