↑Ryder, Alan (٢٠٠٧). The Wreck of Catalonia. Civil War in the Fifteenth Century. Oxford University Press. لاپەڕەv. ژپنک٩٧٨-٠-١٩-٩٢٠٧٣٦-٧. 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