Imangaliyeva, Ainur, Seilkhanova, Gulziya, Ondasheva, Asel, AND Telkhozhayeva, Madina. " Adsorption studies of Cu (II), Pb (II) and Cr (VI) by chitosan/unitiol composite" International Journal of Biology and Chemistry [Online], Volume 11 Number 1 (23 August 2018)