Levon, F., and G. Julavska. “Features of Physiological-Biochemical Processes in the Leaves of Populus Bolleana Lauche, Ulmus Pinnato-Ramosa Dieck. and Elaeagnus Angustifolia L. In Conditions of Industrial Pollution of the Environment”. Plant Introduction, Vol. 3, Dec. 1999, pp. 118-24, doi:10.5281/zenodo.3365320.