Lichens as Indicators of the Urban Environment Quality. ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference, [S. l.], v. 3, p. 20–21, 2015. DOI: 10.17770/etr2013vol3.872. Disponível em: https://archive-journals.rtu.lv/etr/article/view/3909.. Acesso em: 11 mar. 2026.