Hopkins BC. UNITY IN ANCIENT AND MODERN PHILOSOPHY AND THE HYPOTHESIS OF UNIVERSAL HISTORY. PRB [Prieiga per internetą]. 2012 m.sausio1 d. [žiūrėta 2025 m.lapkričio7 d.];82:59-6. Adresas: https://www.zurnalai.vu.lt/problemos/article/view/726