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3. M. Reimbert and A. Reimbert, Silos-Traité Théoretique et Pratique, Editions Eyrolls, Paris (1961).
4. J. M. Haeger and S. S. Safarian, “A New Concept of Storage Bin Construction,” 9 Proceed V 64: J. Am. Conc. Inst. 9:575–597 (Sept. 1967).
5. S. S. Safarian and E. C. Harris, “Silos and Bunkers,” M. Fintel (ed), Handbook of Concrete Engineering, Van Nostrand Reinhold Company, New York (1974).