1. Catalyse de la liquefaction des charbons par hydrogenation sous pression;Andres;J. Chim. Phys.,1979
2. Production of pyrrhotites by pyrite reduction;Lambert;Fuel,1980
3. Disposable catalysts for coal liquefaction;Moroni;Amer. Chem. Soc., Div. Fuel Chem., Prepr.,1980
4. The relationship between the properties of iron sulfides and their catalytic activity;Stahl,1981
5. A further development of proven I.G. Farben technology;Würfel;Fuel Processing Technology,1979