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2. P. I. Luk’yanov, Devices with Moving Granular Layer [in Russian], Mashinostroenie, Moscow (1974).
3. A. V. Katalymov and V. A. Lyubartovich, Batching of Loose and Viscous Materials [in Russian], Khimia, Leningrad (1990).
4. G. K. Klein, Structural Mechanics of Loose Bodies [in Russian], Stroiizdat, Moscow (1977).
5. V. V. Sokolovskii, Loose Medium Statics [in Russian], Fizmatgiz, Moscow (1960).