Ryder, Alan (2007). The Wreck of Catalonia. Civil War in the Fifteenth Century. Oxford University Press. стр. v. ISBN978-0-19-920736-7. „This group of states comprised the kingdoms of Aragon, Valencia, and Majorca, the principality of Catalonia, and the counties of Roussillon and Cerdagne; further afield it embraced the kingdoms of Sicily and Sardinia. These states had no common institutions or bonds save allegiance to a common sovereign”
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I. Ruiz Rodríguez, Apuntes de historia del derecho y de las instituciones españolas, Dykinson, Madrid, 2005, p. 179. (In Spanish)
