Joseph Asunka, Sarah Brierley, Miriam Golden, Eric Kramon and George Ofosu. “Electoral Fraud or Violence: The Effect of Observers on Party Manipulation Strategies”, British Journal of Political Science (2017): 1–23. DOI: 10.1017/S0007123416000491. См. также: Joseph Asunka, Sarah Brierley, Miriam Golden, Eric Kramon and George Ofosu. “Protecting the Polls: The Effect of Observers on Election Fraud” (неопубликованная рукопись, University of California, 2014): 8–9.
