V. Zacharias, and S. Braun. Workshop on Social and Collaborative Construction of Structured Knowledge (CKC), 16th International World Wide Web Conference (WWW 2007), (8-12 May 2007)
S. Braun, A. Schmidt, and V. Zacharias. Mensch & Computer - 7. Fachübergreifende Konferenz (M&C 2007), Munich, Germany, Oldenbourg Verlag, (2-5 September 2007)