Safin Р. ., Sotnikov В. ., Grunin Л. ., Ivanova М. ., and Ziatdinova Д. . “Quality Control of Activated Carbon by the Nuclear Magnetic Resonance Method”. Lesnoy Zhurnal (Russian Forestry Journal), no. 5, Oct. 2022, pp. 173-85, doi:10.37482/0536-1036-2022-5-173-185.