Boonpeng, Poonyasiri, Chawaroj Jaisin, and Krisda Yingkayun. 2019. “Chlorella Sp. Cultivation Using Carbon Dioxide Concentration Control System”. Research on Modern Science and Utilizing Technological Innovation Journal (RMUTI Journal) 13 (2):18-38. https://ph01.tci-thaijo.org/index.php/rmutijo/article/view/204994.