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Saak، E.L. (2002). "Pelagian/anti-Pelagian Preaching: Predestination, Grace, and Good Works in the Sermons of Jordan of Quedlinburg, Oesa (D. 1380)". Augustiniana. ج. 52 ع. 2/4: 311–334. ISSN:0004-8003. JSTOR:44992752.
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