00616naa#a2200193#i#450# EN\\bibl\122709 20260818134437.2 2782-6678 20251031b2025####ek#y0engy0150####ca RUS RU Transformation of the Boundaries of the Forest-Steppe Zone: Causes and Consequences Journal article Moscow MIIGAiK 2025 9 с. Journal article local Физическая география. 39.19 grnti Shakirov Rustem Ravilevich Lugovskoy Aleksandr Mihaylovich miigaik.editorum.ru