Islam, M. Tazul, & M. Jamaluddin Ahmed. "A Simple Spectrophotometric Method for the Trace Determination of Zinc in Some Real, Environmental, Biological, Pharmaceutical, Milk and Soil Samples Using 5,7- Dibromo-8-hydroxyquinoline." Pakistan Journal of Analytical & Environmental Chemistry [Online], 14.1 (2013): 15. Web. 20 Feb. 2020