Onsarn, A. ., S. . Mattaraj, W. . Dechapanya, K. . Ratanapongleka, T. . Rattanaweerapan, and S. . Sanongraj. “Application of Nanofiltration Membrane for Calcium Sulfate and Natural Organic Matter Removal”. Engineering and Technology Horizons, vol. 39, no. 2, June 2022, pp. 70-81, https://ph01.tci-thaijo.org/index.php/lej/article/view/247035.