SAENGKHAE, C., R. SRIVIBOOL, R. WATANADILOK, and K. ENOMOTO. “Partially Purified Pigment Extract from Streptomyces A 16-1 Induces Apoptosis of Human Carcinoma of Nasopharynx Cell (KB Cells) via the Mitochondrial and Caspase-3 Pathway”. Walailak Journal of Science and Technology (WJST), vol. 14, no. 1, Jan. 2016, pp. 51-63, https://wjst.wu.ac.th/index.php/wjst/article/view/2008.