Gomelya, N., Trokhуmenko G., Shabliy, T. and Hlushko, O. 2017. Efficiency estimation of cation-exchange recovery of heavy metals from solutions containing their mixtures. Technology audit and production reserves. 2, 3(40) (Dec. 2017), 41–47. DOI:https://doi.org/10.15587/2312-8372.2018.129633.