1. Akram, M., and W.D. Kemper. 1979. Infiltration of soils as affected by the pressure and water content at the time of compaction. Soil Sci. Soc. Am. J. 43: 1080–1086.
2. 1985 Annual Book of ASTM Standards;American Society for Testing and Materials,1985
3. Amir, I., G.S.V. Raghavan, E. McKyes, and R.S. Broughton, 1976. Soil compaction as a function of contact pressure and soil moisture content. Can. Agric. Eng. 18:54–57.
4. Bailey, A.C., and G.E. Vanden Berg. 1967. Yielding by compaction and shear in unsaturated soils. Trans. Am. Soc. Agric. Eng. 11:307–311,317.
5. Bailey, A.C., C.E. Johnson, R.L. Schafer, T.A. Nichols, and R.D. Grisso. 1985. A compaction model for agricultural soil. In: Soil Dynamics as Related to Tillage Machinery Systems. Proc. International Conference on Soil Dynamics. Vol. 2. June 17–19, 1985 National Tillage Machinery Laboratory and the Agricultural Engineering Department, Alabama Experiment Station, Auburn University, Auburn, AL. pp. 203–212.