1. Tyutkova E. A., Loskutov S. R., Dorzhiev D. V. SEASONAL CHEMICAL STRUCTURE VARIABILITY IN BETULA TORTUOSA LEDEB. TREE RINGS IN ALPINE FOREST-TUNDRA OF KUZNETSK ALA TAU MOUNTAINS // Chemistry of plant raw material, 2023. № 3. P. 63-70. URL: https://journal.asu.ru/cw/article/view/11761.