Ai Phuong, Duong, and Nguyen Van Den. “STUDY OF ANALYTICAL METHOD BY IR-SPECTROSCOPY IN LOW TEMPERATURE”. Science and Technology Development Journal 5, no. 7&8 (August 31, 2002): 63-67. Accessed December 22, 2024. http://stdj.scienceandtechnology.com.vn/index.php/stdj/article/view/3430.