BACHEV, H. I.; IVANOV, B. Factors for inclusion of wastewater treatment sludgein agri-food chain in Bulgaria. Journal of Economics Library, [S. l.], v. 8, n. 3, p. 107–129, 2021. DOI: 10.1453/jel.v8i3.2232. Disponível em: https://journals.econsciences.com/index.php/JEL/article/view/2232. Acesso em: 4 jul. 2024.