J. . Csugány in T. Tánczos, „Regional Differences in the Conditions of Technological Progress in Europe“, OE, let. 66, št. 1, str. 1–12, jul. 2020, Pridobljeno: 24. november 2025. [Na spletu]. Dostopno na: https://old.journals.um.si/index.php/oe/article/view/2134