นิเทศพัตรพงศ์ ส. “Influence of N,P, K and Mg on Yield of Oil Palm Grown on Kohong Soil Series”. Thai Agricultural Research Journal, vol. 13, no. 3, Feb. 2020, pp. 164-7, https://li01.tci-thaijo.org/index.php/thaiagriculturalresearch/article/view/239270.