1. Author's Certificate USSR No.321467; Byull.Izobr.i Tov.Znakov, No.35 (1971).
2. S.S.Zabrodskii, Aerodynamics and Heat Exchange in Fluidized Beds (in Russian), Gosénergoizdat (1963).
3. I.M.Razumov and L.I.Larionova, Khim.Mashinostroenie, No.1 (1961).
4. M.I.Fridland and A.I.Skoblo, Khim.Mashinostroenie, No.5 (1960).
5. M.I.Fridland and A.I.Skoblo, Izv.Vuzov, Neft i Gaz, No.1 (1960).