GETZOVA, V.; BERBEROVA, R. Survey of the Use of the System for Separate Collection of Household Waste from Packaging in the Municipality of Stara Zagora. Annual of Natural Sciences Department, [S. l.], v. 6, p. 23–35, 2021. DOI: 10.33919/ansd.20-21.6.3. Disponível em: https://ojs.nbu.bg/index.php/ANSD/article/view/542. Acesso em: 28 mar. 2024.