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Wangerin, Laura (December 2014). "Empress Theophanu, Sanctity, and Memory in Early Medieval Saxony". Central European History. 47 (4): 716–736. doi:10.1017/S0008938914001927. S2CID144928369.
Wangerin, Laura (December 2014). "Empress Theophanu, Sanctity, and Memory in Early Medieval Saxony". Central European History. 47 (4): 716–736. doi:10.1017/S0008938914001927. S2CID144928369.