1. Australian Patent PF7814, “Method of and Apparatus for Contacting Fluids and Particulate Materials”, Inventor D.J. Nicklin. January 28, 1983.
2. Australian Patent PF7815, “Recovery of Oil from Solid Hydrocarbonaceous Material”, Inventor D.J. Nicklin. January 28, 1983.
3. Morgantown Energy Technology Center, Topical Report, “Oil Shale Combustion/Retorting”, No. DOE/METC/SP - 197. May 1983.