Thiem, Thiệm. “NEUTRON CALIBRATION FIELD OF (_^239)Pu-Be SOURCE: DOSIMETRIC QUANTITIES OF THE TOTAL COMPONENT”. Journal of Military Science and Technology, no. 74 (August 26, 2021): 106–112. Accessed April 3, 2025. https://en.jmst.info/index.php/jmst/article/view/15.