Visioning and Engineering the Knowledge Society - A Web Science Perspective : Second World Summit on the Knowledge Society, WSKS 2009, Chania, Crete, Greece, September 16-18, 2009. Proceedings - Miltiadis D. Lytras, Ernesto Damiani, John M. Carroll, Robert D. Tennyson, David Avison, Ambjörn Naeve, Adrian Dale, Paul Lefrere, Felix Tan, Janice Sipior, . Gottfried Vossen ((Lecture Notes in Computer Science))