Saenge Chooklin, Chanika, Akom Khatfan, and Kattinat Sagulsawasdipan. “Utilization of Palm Oil Mill Effluent for Bio-Extract Production: Physical, Chemical and Microbial Properties, and Application to Growth of Chinese Kale”. Science & Technology Asia 26, no. 3 (September 6, 2021): 142–155. Accessed March 29, 2024. https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/241583.