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.