Open and Social Technologies for Networked Learning IFIP WG 3.4 International Conference, OST 2012, Tallinn, Estonia, July 30 – August 3, 2012, Revised Selected Papers - Ley, Tobias; Ruohonen, Mikko; Laanpere, Mart; Tatnall, Arthur (Springer Berlin Heidelberg : Imprint: Springer, 2013)