Kenessova, A. K., et al. “Composite Materials Based on Orange and Pomegranate Peels for Сu (II) and Zn (II) Ions Extraction”. International Journal of Biology and Chemistry, vol. 13, no. 1, Aug. 2020, pp. 154-60, doi:10.26577/ijbch.2020.v13.i1.16.