Valtonen, T., S. Havu-Nuutinen, P. Dillon, S. Kontkanen, M. Vesisenaho, and S. Pöntinen. “Challenges with social software for collaboration: Two case studies from teacher training”. Seminar.net, vol. 9, no. 1, Nov. 2013, doi:10.7577/seminar.2391.