Apoyan, Svetlana H., Samvel M. Vardapetyan, Anahit M. Hovhannisyan, and Gohar F. Mkrtchyan. “QUANTITATIVE DETERMINATION OF TANNIN IN NETTLE BY SPECTROPHOTOMETRIC AND CHROMATOGRAPHIC METHODS”. Proceedings of the YSU B: Chemical and Biological Sciences 55, no. 1 (254) (April 28, 2021): 12–15. Accessed May 3, 2024. https://journals.ysu.am/index.php/proceedings-chem-biol/article/view/vol55_no1_2021_pp012-015.