ARNAUDOVA, J.; POPOV, K. The Use of GIS in Viticulture Microregioning in the Area of Suhindol, Bulgaria. Bulgarian Journal of Agricultural Science, Sofia, BG, v. 17, n. 3, p. 357–363, 2011. Disponível em: https://agriacad.eu/ojs/index.php/bjas/article/view/5951.. Acesso em: 27 oct. 2026.