Suwanarit, A., S. Buranakarn, S. Kreetapirom, P. Kangkae, J. Phumphet, P. Phiatanen, S. Somboonpong, S. Ratanasupa, P. Romyen, S. Wattanapayapkul, K. Naklang, S. Rotjanakusol, P. Charoendham, W. Palaklang, S. Satawathananon, and W. Inthalang. “Equations for Calculating N-Fertilizer Rates for Khaw Dauk Mali-105 Rice from Soil Analysis”. Agriculture and Natural Resources, vol. 33, no. 2, June 1999, pp. 224-33, https://li01.tci-thaijo.org/index.php/anres/article/view/240483.