Savenets, M., L. Nadtochii, and I. Dvoretska. “NO2 SEASONAL AND INTERANNUAL VARIABILITY IN UKRAINIAN INDUSTRIAL CITIES”. GeoScience Engineering, vol. 64, no. 4, Dec. 2018, pp. 29-36, http://geoscience.cz/ojs/index.php/GSE/article/view/184.