Suwannakan Supmattrra, Piyaporn Jitaek, Khongdet Phasinam, Dowroong Watcharinrat, Phraomas Charoenrak, Pimpan Pimonrat,. “EFFECTS OF WATER LEVELS AND DISSOLVED OXYGEN CONCENTRATION ON THE GROWTH OF CELERY CULTIVATED IN A DFT HYDROPONIC SYSTEM”. Design Engineering (July 18, 2021): 3669- 3675. Accessed April 30, 2024. http://www.thedesignengineering.com/index.php/DE/article/view/2788.