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CURTA, Florin; HOLT, Andrew. Great Events in Religion: An Encyclopedia of Pivotal Events in Religious History [3 volumes]. [s.l.]: ABC-CLIO Dostupné online. ISBN978-1-61069-566-4. S. 342. (anglicky)
STAUFFER, Suzanne M. Libraries, Archives, and Museums: An Introduction to Cultural Heritage Institutions Through the Ages. [s.l.]: Rowman & Littlefield Dostupné online. ISBN978-1-5381-1891-7. (anglicky)