1. Bull, F. A.; “The Designation of the Fineness of Pulverized Brown Coal,” J. Inst. Fuel, 28, 63–170 (1955)
2. Einstein, A.; “Eine nenu Bestimmung der Molekul-dimensionen,” Ann. Physik, 19, 289–306 (1906)
3. On the viscosity of a concentrated suspension of solid spheres
4. Funas, C. C.; “Grading Aggregates,” Ind. Eng. Chem., 23, 1052–1058 (1931)
5. Funk, J. E., D. R. Dinger and J. E. Funk, Jr.; “Coal Grinding and Particle Size Distribution Studies for Coal Water Slurries at High Solids Content,” US Patent 4, 282, 006 (1981)