B. Vuković, D., A. Shpak, N., M. Radovanović, M., Portugal Duarte, A. and Radulović, D. (2015) “THE ROLE OF HUMAN RESOURCES ON THE ECONOMY: A STUDY OF THE BALKAN EU MEMBER STATES”, Journal of the Geographical Institute “Jovan Cvijić” SASA, 65(2), pp. 253–268. doi: 10.2298/IJGI1502123V.