Xa, L. T. ., N. K. Nghia, and H. B. Tecimen. “Environmental Factors Modulating Indole-3-Acetic Acid Biosynthesis by Four Nitrogen Fixing Bacteria in a Liquid Culture Medium: 10.32526/Ennrj/20/202100233”. Environment and Natural Resources Journal, vol. 20, no. 3, Apr. 2022, pp. 279-87, https://ph02.tci-thaijo.org/index.php/ennrj/article/view/246191.