URBANSKI, Charity. Writing history for the king : Henry II and the politics of vernacular historiography pp.160 [online]. Cornell University Press: Ithaca : Cornell University Press, 2013 [cit. 2021-12-12]. Dostupné online. ISBN978-0-8014-5131-7. (anglicky)
JACKIEWICZ, Andrzej Igor. Białystok Law Books 4 Territorial Organization Of European States. Federalism, Regionalism, Unitarism. [s.l.]: Wydawnictwo Temida 2 Dostupné online. ISBN978-83-62813-16-2. (anglicky)
FASSLER, Margot Elsbeth. The Virgin of Chartres: Making History Through Liturgy and the Arts. Yale: Yale University Press 612 s. Dostupné online. ISBN978-0-300-11088-3. S. 29. (anglicky)