Thongmak, N., Jijai, S., Hajimasalaeh , W., Muleng, S. and Sridang , P. . (2021) “Efficiency of Palm Oil Mill Fly Ash for Residential Building Wastewater Treatment”, Rajamangala University of Technology Srivijaya Research Journal, 13(2), pp. 269–284. Available at: https://li01.tci-thaijo.org/index.php/rmutsvrj/article/view/240547 (Accessed: 1 May 2024).