Beyond the Base. Political Parties, Citizen Activists, and Digital Media Use in the 2009 German Federal Election
together with Lauren Copeland), in:
Chasing the Digital Wave:
International Perspectives on the Growth of Online Campaigning
A Special Issue of the Journal of Information, Technology and Politics,
Ed. Rachel Gibson, Andrea Römmele, Andrew Williamson,
Issue 2, 2014, pp. 14–29.