1. Development of coal-burning diesel engines in Germany;Soehngen,1976
2. K. Benedek, Arthur D. Little Inc., Cambridge, MA, personal communication, December 1988.
3. Abrasiveness of fine grain particles in slurry machinery;Func,1982
4. Erosivity of coal particles in coal-solvent slurries;Levy,1987
5. The wear of selected materials in mineral oil containing a solid contaminant;Mehan;Wear,1988