Ruamrungsri, Soraya, Watcharaphon Bumphenyoo, Rumjuan Sriwichai, and Pimchai Apavatjrut. 2007. “ Phosphorus and Potassium Deficiencies on Growth and Development of Globba rosae Gagnep”. Agriculture and Natural Resources 41 (1). Bangkok, Thailand:72-83. https://li01.tci-thaijo.org/index.php/anres/article/view/244182.