Dimitrova, D., I. Boev, and V. Zajkova Panova. “Heavy and Toxic Metals in Water and Sediments of the Vardar River in Skopje”. Geologica Macedonica, Vol. 29, no. 1, June 2015, pp. pp. 25-46, https://js.ugd.edu.mk/index.php/GEOLMAC/article/view/1008.