1. Results from tests with normal and shear cells in a medium-scale model silo;Askegaard;Powder Technol.,1985
2. bulk-online forum, http://forum.bulk-online.com.
3. Silo failures: case histories and lessons learned;Carson,2000
4. On the theory of arching in mass flow hoppers;Enstad;Chem. Eng. Sci.,1975
5. Action on Structures – Part 4: Silos and Tanks, Brussels, Belgium;Eurocode 1, EN 1991-4,2006