Hongthong, P., Mattaraj, S. and Jiraratananon, R. (2013) “Effects of Solution pH and Ionic Strength for Removal of Combined Natural Organic Matter and Copper (II) Ion by Membrane Nanofiltration”, Applied Environmental Research, 34(2), pp. 39–56. available at: https://ph01.tci-thaijo.org/index.php/aer/article/view/9744 (accessed: 10 April 2025).