QAZI, Mansoor Ahmed et al. Evaluation of Complexation Behavior of Calix[4]arene Derivative. Pakistan Journal of Analytical & Environmental Chemistry, [S.l.], v. 11, n. 1, june 2010. ISSN 2221-5255. Available at: <http://pjaec.pk/index.php/pjaec/article/view/61>. Date accessed: 14 aug. 2022.