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PESKOWITZ, Zachary. Ideological Signaling and Incumbency Advantage. British Journal of Political Science. 2017-05-01, s. 467–490. Dostupné online. ISSN0007-1234. DOI10.1017/S0007123416000557.Je zde použita šablona {{Cite journal}} označená jako k „pouze dočasnému použití“.