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Robert G. Eccles, Scott C. Newquist, and Roland Schatz, February 2007
Thomas E. Patterson, Shorenstein Center on Media, Politics and Public Policy, June 2016
Hans-Jörg Naumer, February 2020
Hans-Jörg Naumer and B. Burcin Yurtoglu, February 2020
Hans-Jörg Naumer and B. Burcin Yurtoglu, Dezember 2019
Hans-Martin von Gaudecker und Axel Wogrolly, April 2019
Michael Berlemann und Tobias Thomas (2019)
Iris Carola Pfeiffer (2018)
Ralf Dewenter, Melissa Linder, Tobias Thomas (2018)
Lukas Püttmann (2018)