Pohl, A., Gehlen-Baum, V. and Bry, F. (2012) “Enhancing the Digital Backchannel Backstage on the Basis of a Formative User Study”, International Journal of Emerging Technologies in Learning (iJET), 7(1), pp. pp. 33–41. doi: 10.3991/ijet.v7i1.1898.