Pennell, C. R. The Geography of Piracy: Northern Morocco in the Mod-Nineteenth Century // Bandits at Sea: A Pirates Reader. NYU Press. ISBN 9780814766781. с. 56. Посетен на 18 февруари 2015. Sea raiders [...] were most active where the maritime environment gave them most opportunity. Narrow straits which funneled shipping into places where ambush was easy, and escape less chancy, called the pirates into certain areas.
