Le, Huu Loi, Hoang Long Nguyen, Quang Son Ong, Manh Dung Ho, Van Hoang Dao, Truong Son Truong, Van Tien Vo, and Quang Vuong Le. “Establishment and Quality Assessment of X-Ray Narrow Spectrum Series According to ISO 4037:2019 at SSDL of Center For Nuclear Technologies”. Nuclear Science and Technology 12, no. 1 (January 13, 2023): 01-11. Accessed December 5, 2024. http://old.vinatom.gov.vn/index.php/nst/article/view/374.