พันธุ์พฤกษ์ ไ. “Iron Foliar Fertillization on Mungbean Production in Alkaline Soil”. Thai Agricultural Research Journal, vol. 23, no. 1, Aug. 2019, pp. 21-29, https://li01.tci-thaijo.org/index.php/thaiagriculturalresearch/article/view/210537.