Czaja, Monika, Anna Kołton, Agnieszka Baran, Ewa Muszyńska, and Piotr Muras. 2016. “Physiological Responses of Betula Pendula Roth Growing in Polluted Areas”. Ecological Questions 22 (March):39-46. https://doi.org/10.12775/EQ.2015.021.