Gavinlertvatana, Paiboolya. “Relationship of the Growth of Orchid Tissue to Changes in pH of the Growth Medium”. Thai Agricultural Research Journal 2, no. 1 (January 1, 1984): 31–37. accessed October 1, 2026. https://li01.tci-thaijo.org/index.php/thaiagriculturalresearch/article/view/245426.