Cristea, O. The Quest for Maritime Supremacy in the Black Sea during the later Middle Ages: Ovidiu Cristea. The Balkans and Caucasus : parallel processes on the opposite sides of the Black Sea.(2012).
Chicago-referens (17:e uppl.)Cristea, Ovidiu. "The Quest for Maritime Supremacy in the Black Sea During the Later Middle Ages: Ovidiu Cristea." The Balkans and Caucasus : Parallel Processes on the Opposite Sides of the Black Sea.(2012) .
MLA-referens (8:e uppl.)Cristea, Ovidiu. "The Quest for Maritime Supremacy in the Black Sea During the Later Middle Ages: Ovidiu Cristea." The Balkans and Caucasus : Parallel Processes on the Opposite Sides of the Black Sea.(2012), .
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