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Berend et al. (2007), p. 348. (EN) Nora Berend, József Laszlovszky e Béla Zsolt Szakács, The Kingdom of Hungary, in Christianization and the Rise of Christian Monarchy: Scandinavia, Central Europe and Rus' c.900-1200, 1ª ed., Cambridge, Cambridge University Press, 2007, pp. 319-368, ISBN978-11-39-46836-7.