Ergozhin, E. E., Tugelbaeva L. М., Tausarova, B. R., & Ashkeeva, R. K. (2013). Complex formation of polyelectrolytes with different groups of heavy and transition metal ions. International Journal of Biology and Chemistry, 5(1), 44–48. Retrieved from https://ijbch.kaznu.kz/index.php/kaznu/article/view/81