Zhang, Dong, and Guang Sheng Zhao. 2013. ‚ÄúDetermination of Trace Selenium in Urine and Water Samples by Hydride Generation Atomic Absorption Spectrometry After Preconcentration Separation With Modified Organobentonite With Dithizone‚ÄĚ. Asian Journal of Chemistry 25 (17):9736-38. https://doi.org/10.14233/ajchem.2013.15262.