O. Adigwe, Edward. „A Comparative Analysis of Competitive Trade in a Cluster Market of the European Union: The Revealed Comparative Advantage (RCA) Index“. Naše gospodarstvo/Our economy 68, no. 1 (julij 11, 2022): 14–24. Pridobljeno november 24, 2025. https://old.journals.um.si/index.php/oe/article/view/2096.