Никифоров, А. В., and М. П. Никифорова. “Analysis of Modern Spatio-Temporal Changeability of Ozone Common Maintenance Above the Carpathians Region”. Visnyk of V. N. Karazin Kharkiv National University Series «Еcоlogy», no. 893, 1, pp. 30-39, https://periodicals.karazin.ua/ecology/article/view/840.