Shakeshev, M. T., D. Yu. Korulkin, and M. K. Nauryzbaev. 2015. “Tannin Quantification in Industrial Waste of Tobacco Production and Selection of Optimal Extraction Parameters”. International Journal of Biology and Chemistry 8 (2):81-84. https://doi.org/10.26577/2218-7979-2015-8-2-81-84.