Chiarawipa, Rawee, and Wittaya Prommee. 2017. “Age-related trends in carbohydrate reserves, latex yields, macronutrient contents, chemical compositions and physical-mechanical properties in rubber trees”. Asia-Pacific Journal of Science and Technology 18 (3):449-63. https://so01.tci-thaijo.org/index.php/APST/article/view/82868.