Apoyan, S.H. et al. 2021. QUANTITATIVE DETERMINATION OF TANNIN IN NETTLE BY SPECTROPHOTOMETRIC AND CHROMATOGRAPHIC METHODS. Proceedings of the YSU B: Chemical and Biological Sciences. 55, 1 (254) (Apr. 2021), 12–15. DOI:https://doi.org/10.46991/PYSU:B/2021.55.1.012.