1. American Society for Testing and Materials (1980). Natural Building Stones; Soil and Rock. Annual Book of ASTM Standards. Part 19, Philadelphia. pp. 113–123.
2. Research on the Atterberg limits of soils;Casagrande;Public Roads,1932
3. Earthtech Research Corporation (1981). Thermal properties of soils and soils testing. A Report Submitted to the Department of Energy, San Francisco, California, Contract No. DE-AC03–80SF11509.
4. Fink, L. H. (1960). Soil Moisture Characteristics. Part II of a report of the American Institute of Electrical Engineers, 1960, 803–819.
5. Discussion of Thermal Instability and Its Prediction in Cable Backfill Soils, Radhakrishna, H. S. and others (1980);Fink;IEEE Transactions on Power Apparatus and Systems,1980