<hi xmlns="http://www.tei-c.org/ns/1.0" rend="bold"><abbr>Viégas</abbr>, Fernanda B. / Wattenberg, Martin / Feinberg, Jonathan</hi> (2009): "Participatory Visualization with Wordle", in: <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic">IEEE Transactions on Visualization and Computer Graphics</hi> 15, 6: 1137–1144.