Duman, Okan, Celalettin Özdemir, Atila Demiröz, and Muhammed Kamil Oden. 2014. “Removal of Zn<sup>+2</sup> and Pb<sup>+2</sup> From Wastewater by Using Natural Nano Montmorillonites”. Asian Journal of Engineering and Technology 2 (5). https://www.ajouronline.com/index.php/AJET/article/view/1717.