Zhang, Dong, and Guang Sheng Zhao. “Determination of Trace Selenium in Urine and Water Samples by Hydride Generation Atomic Absorption Spectrometry After Preconcentration Separation With Modified Organobentonite With Dithizone”. Asian Journal of Chemistry 25, no. 17 (November 12, 2013): 9736–9738. Accessed April 24, 2024. https://asianpubs.org/index.php/ajchem/article/view/25_18_67.