Pulsawat, W., and P. Khanitchaidecha. “Screening and environmental factors effecting on growth of heparinase-producing bacteria”. Asia-Pacific Journal of Science and Technology, vol. 17, no. 4, Apr. 2017, pp. 593-06, https://so01.tci-thaijo.org/index.php/APST/article/view/83271.