Tyutkova, E.A., Loskutov, S.R. and Dorzhiev, D.V. 2023. SEASONAL CHEMICAL STRUCTURE VARIABILITY IN BETULA TORTUOSA LEDEB. TREE RINGS IN ALPINE FOREST-TUNDRA OF KUZNETSK ALA TAU MOUNTAINS. chemistry of plant raw material. 3 (Oct. 2023), 63-70. DOI:https://doi.org/10.14258/jcprm.20230311761.