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3. Study on influence of friction coefficients on the behavior of granular materials in silo during discharge using the distinct element method;Yoshida;J. Soc. Powder Tech. Japan,1992
4. J. Yoshida, A study on convergence in calculation of static equilibrium state using the distinct element method, 47th Doboku-gakkai Nenji Gakujutsu Kouenkai Kouen Gaiyou-shu Part III, p. 554 (1992) (in Japanese).
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