1. F. Winkler, Verfahren zum Herstellen Wassergas, Patent DE437970C, 1922.
2. Fluidization;Leva,1959
3. Fluidization and Fluid-Particle Systems;Zenz,1960
4. Types of gas fluidization;Geldart;Powder Technol.,1973
5. Innovative improvements highlight FCC’s past and future;Avidan;Oil Gas J.,1990