George, Louis, Anitha Varghese, and Aatika Nizam. “Determination of Thallium in Environmental Samples by Surfactant Assisted Dispersive Liquid-Liquid Microextraction Combined With First Order Derivative Spectrophotometry”. European Journal of Chemistry 6, no. 2 (June 30, 2015): 183–188. Accessed April 28, 2024. https://www.eurjchem.com/index.php/eurjchem/article/view/1241.