Lawongsa, P., P. Puttaso, and N. Kaewjampa. “Microbial and Physical-Chemical Properties As Influenced by Land Use Change in the Conversion of Cassava into Rubber Tree Plantation System”. Asia-Pacific Journal of Science and Technology, vol. 21, no. 3, Sept. 2016, pp. 36-43, doi:10.14456/apst.2016.4.