CLIMATIC CHANGES IN THE PARAMETERS OF THE ACTIVE VEGETATION PERIOD IN THE SOUTH OF WESTERN SIBERIA. Proceedings of the YSU C: Geological and Geographical Sciences, Yerevan, Armenia, v. 59, n. 2 (266), p. 543–548, 2025. DOI: 10.46991/PYSUC.2025.59.2.543. Disponível em: https://journals.ysu.am/index.php/proceedings-geol-geogr/article/view/vol59_no2_2025_pp543-548. Acesso em: 23 jan. 2026.