1. The Lurgi-Ruhrgas process for the retorting of oil shale;Rammler,1982
2. The Chevron STB oil shale retort;Tamm;Energy Prog.,1982
3. Process concept for retorting of Julia Creek oil shale;Sitnai;Energy Prog.,1984
4. Fluidised bed retorting of coal and oil shale;Nicklin,1984
5. Battelle's multi-solids fluidised bed oil shale retort;Shirley,1983