Sungthongwises, K., and S. Taweekij. “Abilities of Phosphate Solubilizing Bacteria Isolated from Sandy Soils under Rubber Tree Plantations of Different Ages in Northeast Thailand”. Asia-Pacific Journal of Science and Technology, vol. 21, no. 4, Feb. 2018, pp. APST-21, doi:10.14456/apst.2016.11.