Khuangthip, T., T. Seetawan, S. Kantee, and V. Amornkitbamrung. “Studies on the electronic structures of Bi2Te3 by DX-X alpha method”. Asia-Pacific Journal of Science and Technology, vol. 13, no. 6, Apr. 2017, pp. 651-6, https://so01.tci-thaijo.org/index.php/APST/article/view/83675.