1. Aboshi H. Ichimoto E. Harada K. and Emoki M. “The Compozer: a Method to Improve Characteristics of Soft Clays by Inclusion of Large Diameter Sand Column ” Collogue Inter sur le Reinforcement des Sols E.N.P.C. Paris France 1974 pp. 211–216.
2. Barksdale R. D. and Bachus R. C. “Design and Construction of Stone Columns Volume I ” U.S. Department of Transportation Federal Highway Administration Report No. FHWA/RD‐83/026 1983 p. 210.
3. Field testing to evaluate stone column performance in a seismic area
4. Greenwood D. A. “Mechanical Improvement of Soils Below Ground Surface ” Proceedings of Conference on Ground Engineering Institute of Civil Engineers London 1970 pp. 11–12.