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References
- Perry, Guy (2013). John of Brienne: King of Jerusalem, Emperor of Constantinople, c. 1175–1237. Cambridge University Press. ISBN 978-1-107-04310-7.
- Perry, Guy (2018). The Briennes: The Rise and Fall of a Champenois Dynasty in the Age of the Crusades, C. 950–1356. Cambridge University Press.
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