Simonova, T. N., Dubrovina, V. A., & 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), 645–659. https://doi.org/10.2298/JSC150630016S