G. Jusufi in B. Bellaqa, „Trade Barriers and Exports between Western Balkan Countries“, OE, let. 65, št. 4, str. 72–80, jan. 2019, Pridobljeno: 24. november 2025. [Na spletu]. Dostopno na: https://old.journals.um.si/index.php/oe/article/view/2147