Rattanaloeadnusorn, S. “Antagonistic Microbe on Palm Soil for Producing of Plant Growth Promoting Rhizobacteria Yeast and Fungal (PGPR) Mixed Microbe”. Rajamangala University of Technology Srivijaya Research Journal, vol. 12, no. 2, July 2020, pp. 240-9, https://li01.tci-thaijo.org/index.php/rmutsvrj/article/view/245445.