For citations:

Nikiforova T.E., Gabrin V.A., Kozlov V.A. Sorption of copper (II) ions by a composite sorbent based on chitosan and montmorillonite. Plasticheskie massy. 2023;1(7-8):47-52. (In Russ.) https://doi.org/10.35164/0554-2901-2023-7-8-47-52