1. Room scattered neutrons;McCall;Med. Phys.,1999
2. Shielding Techniques and Regulations for New Therapy Accelerators http://www-project.slac.stanford.edu/symposium/
3. Principles of Radiation Shielding
4. Albedo analytical method for multi-scattered neutron flux calculation in cavity;Shin;J. Nucl. Sci. Technol.,1986
5. Engineering Compendium on Radiation Shielding, Volume I: Shielding Fundamentals and Methods