Vatashki, Atanas. “Insights of the Natural Reason in the Search for Truth (Athenagoras of Athens and His Attitude to Ancient Philosophy)”. Forum Theologicum Sardicense, no. 2 (May 22, 2025): 75–82. Accessed August 11, 2025. https://periodicals.uni-sofia.bg/index.php/forum-theologicum-sardicense/article/view/426.