Janjić, N., D. Hasanagić, and T. Maksimović. “Stomatal Apparatus Response of Tilia Cordata (Mill.) and Betula Pendula (Roth.) to Air Quality Conditions in the City of Banja Luka (Bosnia and Herzegovina)”. Biologia Serbica, vol. 39, no. 2, Dec. 2017, https://journal.pmf.uns.ac.rs/index.php/biologiaserbica/article/view/119.