Kuancha, C., and J. Apiraksakorn. “Cultural Condition Improvement for Xylanase Production by Bacillus Subtilis GN156”. Asia-Pacific Journal of Science and Technology, vol. 17, no. 6, Apr. 2017, pp. 933-8, https://so01.tci-thaijo.org/index.php/APST/article/view/83753.