Popitsch,Niko Schandl,Bernhard Amiri,Arash Leitich,Stefan Jochum,Wolfgang Ylvi - Multimedia-izing the Semantic Wiki ESWC2006 2006 Popitsch,Niko Schandl,Bernhard Amiri,Arash Leitich,Stefan Jochum,Wolfgang Ylvi - Multimedia-izing the Semantic Wiki ESWC2006 2006