1. R. Kvapil,Movement of Free-Flowing Materials in Bunkers [Russian translation]. Gosgortekhizdat, Moscow (1961).
2. E. V. Dzhenike,Storage and Discharge of Free-Flowing Materials [in Russian], Mir, Moscow (1968).
3. P. I. Lukyanov,Apparatus with Moving Granular Layer [in Russian] Mashinostroenie, Moscow (1974).
4. N. G. Dubinin,Ore Discharge with Underground Mining [in Russian], Nedra, Moscow (1965).
5. G. M. Malakhov, R. V. Bezukh, and P. D. Petrenko,Theory and Practice of Ore Discharge [in Russian], Nedra, Moscow (1968).