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Simonova, T.N., Dubrovina, V.A. and Vishnikin, A.B. 2016. Speciation of chromium through aqueous two-phase extraction of complexes of Cr(III) with 4-(2-pyridylazo)resorcinol and Cr(VI) with 1,5-diphenylcarbazide. Journal of the Serbian Chemical Society. 81, 6 (Jul. 2016), 645–659. DOI:https://doi.org/10.2298/JSC150630016S.