Kostić, I., T. Anđelković, D. Anđelković, R. Nikolić, A. Bojić, T. Cvetković, and G. Nikolić. “Interaction of cobalt(II), nickel(II) and zinc(II) With Humic-Like Ligands Studied by ESI-MS and Ion-Exchange Method”. Journal of the Serbian Chemical Society, vol. 81, no. 3, Apr. 2016, pp. 255-70, doi:10.2298/JSC150917094K.