X. Wen, D. Parra, and C. Trattner. Proceedings of the Companion Publication of the 17th ACM Conference on Computer Supported Cooperative Work &\#38; Social Computing, page 253--256. New York, NY, USA, ACM, (2014)
W. Reinhardt, M. Ebner, G. Beham, and C. Costa. (2009)Draft Version - Originally published in: Creativity and Innovation ompetencies on the Web, Hornung-Prähauser, V., Luckmann, M. (Ed.) Proceeding of 5. EduMedia conference, p. 145-156, Salzburg.
D. Millen, and J. Patterson. CHI Extended Abstracts, page 720-721. ACM, (2003)http://doi.acm.org/10.1145/765891.765950 . isbn 1-58113-637-4 .
http://dblp.uni-trier.de/db/conf/chi/chi2003a.html#MillenP03.