Ilijevic Konstantin,Grzetic Ivan A,Zivadinovic Ivan,Popovic Aleksandar R (2012) Long-term seasonal changes of the Danube River eco-chemical status in the region of Serbia, ENVIRONMENTAL MONITORING AND ASSESSMENT, vol. 184, br. 5, str. 2805-2828 (Article) 

Zivadinovic Ivan,Ilijevic Konstantin,Grzetic Ivan A,Popovic Aleksandar R (2010) Long-term changes in the eco-chemical status of the Danube River in the region of Serbia, JOURNAL OF THE SERBIAN CHEMICAL SOCIETY, vol. 75, br. 8, str. 1125-1148 (Article)