SLANEV, K.; ENCHEV, S. Influence of Variety and Density on Crop Productivity of Sorghum x Sudan Grass Hybrids in Flowering Stage. Bulgarian Journal of Agricultural Science, Sofia, BG, v. 20, n. 1, p. 182–185, 2014. Disponível em: https://agriacad.eu/ojs/index.php/bjas/article/view/6380.. Acesso em: 8 oct. 2026.