1. Beskow G. (1947). "Soil freezing and frost heaving with special application to roads and railroads." Soil Science 65(4).
2. In Field Soil Characterization: Approach Based on Texture Image Analysis
3. USAF's new contigency soils/pavement testing van;Buncher M. S.;Proceedings of the Conference on Road and Airport Pavement Response Monitoring Systems, West Lebanon, NH,1992
4. Bureau of Bridges and Structures. (2005). Subgrade Stability Manual. Illinois Department of Transportation Springfield IL.
5. Chang G. Xu Q. Rutledge J. Horan B. Michael L. White D. and Vennapusa P. (2011). "Accelerated implementation of intelligent compaction technology for embankment subgrade soils aggregate base and asphalt pavement materials." Rep. No. FHWA-IF-12-002 Federal Highway Administration Washington DC.