User contributions
- 19:37, 12 January 2015 (diff | hist) . . (-946) . . Talk:Aufgaben:Problem 13
- 16:22, 31 December 2014 (diff | hist) . . (+311) . . Aufgaben:Problem 8
- 14:34, 31 December 2014 (diff | hist) . . (+4) . . Talk:Aufgaben:Problem 13 (→Solution)