The Third International Conference on the Digital Society ICDS 2009 : proceedings : 1-7 February 2009, Cancun, Mexico / editors/chairs, Yutaka Takahashi, Lasse Berntzen, Asa Smedberg. - Takahashi, Y. (Yutaka), 1951-; Berntzen, Lasse, Dr; Smedberg, Asa (IEEE Computer Society, 2009)