Durmishi, B. H., S. Abduli, A. A. Reka, M. Ismaili, A. Shabani, and A. Durmishi. “Determination of the Content of Zn, Cu, Pb and Cd in the River Shkumbin (Pena) With Potentiometric Analysis Stripping”. International Journal of Chemistry & Materials Sciences (IJCMS), vol. 1, no. 1, Oct. 2016, pp. 17-32, https://ijcms.ielas.org/index.php/ijcms/article/view/2.