PIRIMOVA, V. Comparative advantages of Bulgarian production and exports. Balkans Journal of Emerging Trends in Social Sciences, Belgrade, Serbia, v. 1, n. 1, p. 22–39, 2018. DOI: 10.31410/Balkans.JETSS.2018.1.1.22-39. Disponível em: https://balkans-jetss.org/index.php/index_bjetss/article/view/8. Acesso em: 27 apr. 2025.