“The study of adsorption activity of chromium ion (Cr(VI)) in chitosan based new materials”, Himi, him. tehnol. hùrèèlèngijn èrdèm šinžilgèènij bùtèèl, vol. 10, no. 10, pp. 58–64, Dec. 2022, doi: 10.5564/bicct.v10i10.2595.