Slack, Donald C., Rocio Reyes Esteves, Aketzalli Espejel, Bernardo Oyorsaval, and Yingjie Ma. “Subsurface drip irrigation: A technology for safer irrigation of vegetable crops”. Engineering and Applied Science Research 44, no. 2 (April 22, 2017): 111–114. accessed September 23, 2026. https://ph01.tci-thaijo.org/index.php/easr/article/view/84202.