JOKOVA, M.; BENKOVA, M.; RAYTCHEV, T. Influence of Some Ameliorants оn the Surface Charges of the Colloids in the Soil Polluted by Heavy Metals. Bulgarian Journal of Soil Science, Agrochemistry and Ecology, Sofia, BG, v. 45, n. 3, p. 33–37, 2011. Disponível em: https://agriacad.eu/ojs/index.php/bjssae/article/view/4052.. Acesso em: 6 oct. 2026.