BORISOV, Petar. State of competitiveness of the wine sector and guidance and opportunities for improvement. Bulgarian Journal of Agricultural Economics and Management, Sofia, BG, v. 56, n. 5, p. 66–77, 2011. Disponível em: https://agriacad.eu/ojs/index.php/bjaem/article/view/4313.. Acesso em: 12 oct. 2026.