Alexandre N.Rcheulishvili, et al. “Assimilation of Cu by the Chromium Resistant Bacterium Arthrobacter Globiformis 151b in the Presence of Ca in Growth Media”. Global Journal of Science Frontier Research, vol. 20, no. A9, July 2020, pp. 61-64, https://journalofscience.org/index.php/GJSFR/article/view/2767.