Reza Ghiasvand, Ali, Farzaneh Moradi, Shahriar Shadabi, Hashem Sharghi, and Ali Reza Hasaninejad. 2010. “Selective Homogeneous Liquid-Liquid Extraction and Preconcentration of Thallium Using a New Calix[4]pyrrole”. Asian Journal of Chemistry 18 (3):2016-24. https://asianpubs.org/index.php/ajchem/article/view/20939.