Istomina, N., and O. Likhacheva. “Using the Lichen Parmelia Sulcata Taylor in the Urban Environment Monitoring”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 2 (June 17, 2015): 116–119. Accessed November 24, 2024. https://journals.ru.lv/index.php/ETR/article/view/282.