SHAQIRI, Lulzim. “Results on Cadmium (Cd) and Nickel (Ni) Concentration in Wild Fish Squalis Cephalus &Barbus Barbus Tissues in Vardar River, North Macedonia”. International Journal of Agricultural and Natural Sciences, vol. 12, no. 2, Nov. 2019, pp. 27-30, https://www.ijans.org/index.php/ijans/article/view/476.