J. Al-Maliky, Salam. 2008. “Basic Concepts for the Design of Nuclear Shelters and the Calculation of Wall Thickness Against a Nuclear Explosion of 20 KT”. Journal of Engineering and Sustainable Development 12 (2): 1-17. https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1659.