LERTCANAWANICHAKUL, Monthon, and Songtham SAWANGNOP. 2011. “A Comparison of Two Methods Used for Measuring the Antagonistic Activity of Bacillus Species”. Walailak Journal of Science and Technology (WJST) 5 (2):161-71. https://wjst.wu.ac.th/index.php/wjst/article/view/86.