1. Un example interessant de houillification dans le bassin Lorrain et ses prolongements;Alpern,1966
2. Pseudovitrinite in Appalachian coking coals;Benedict;Fuel,1968
3. Variations in the properties of vitrinite in isometamorphic coal;Brown;Fuel,1964
4. Separation and characterization of coal macerals including pseudovitrinite;Crelling;Ironmaking Proceedings,1988
5. Effects of weathered coal on coking properties and coke strength;Crelling;Fuel,1979