Ljiljana Nikolić Bujanović, Milan Čekerevac, Miloš Simičić, Anja Jokić, Ružica Mićić, Possibility of use of iron raw materials from wastewater from technological processes for synthesis of ferrate(VI), IX International Conference Industrial Engineering and Environmental Protection 2019 (IIZS 2019) October 11-12th, 2019, Zrenjanin