1. “Engineering Properties of Expansive Clays,”;Holtz;Proceedings, ASCE,1954
2. Donaldson, G. W., “The Occurrence of Problems of Heave and the Factors Affecting its Nature.” Second International Research and Engineering Conference on Expansive Clay Soils, Texas A & M Press, 1969.
3. “Geologic Origin and Distribution of Swelling Clays,”;Tourtelot;Proceedings of Workshop on Expansive Clay and Shale in Highway Design and Construction,1973
4. Salbert, J. R. and Smith, P.C., “Pavement Design over Expansive Clay: Current Practices and Research in the United States,” Engineering Effects of Moisture Change in Soils, International Research and Engineering Conference on Expansive Clay Soils, Texas A & M Press, 1965.
5. “Expansive Soils – The Hidden Disaster,”;Jones;Civil Engineering,1973