D. . Lambrev, „Infrastructure Indices: Comparative Analysis of Performance, Risk and Representation of Global Listed Proxies“, OE, let. 65, št. 3, str. 23–39, jan. 2019, Pridobljeno: 24. november 2025. [Na spletu]. Dostopno na: https://old.journals.um.si/index.php/oe/article/view/2152