รกิติกุล วลีพรรณ. 2020. “The Synthesis of Hydrogel from Canthium Parvifolium Roxb.’s Pection for Nitrogen Fertilizer Releasing”. Ramkhamhaeng Research Journal of Sciences and Technology 23 (1):39-46. https://li01.tci-thaijo.org/index.php/rusci/article/view/244924.