Krissada Sangsing, Xavier Le Roux, Poonpipope Kasemsap, Sornprach Thanisawanyangkura, Kumut Sangkhasila, Eric Gohet and Phillipe Thaler (2004) “Photosynthetic Capacity and Effect of Drought on Leaf Gas Exchange in Two Rubber (Hevea brasiliensis) Clones”, Agriculture and Natural Resources. Bangkok, Thailand, 38(1), pp. 111–122. available at: https://li01.tci-thaijo.org/index.php/anres/article/view/242934 (accessed: 17 September 2026).