1. Aas, G. (1967) A study of the effect of vane-shape and rate of strain on the measured values of in-situ shear strength of clays, In: Proceedings of the International Conference on Soil Mechanics and Foundation Engineering, Montreal, Canada.
2. Consolidation After Undrained Piezocone Penetration. II: Interpretation
3. Bo M.W., Arulrajah A. and Choa V. (1997a). Assessment of degree of consolidation in soil improvement project, In: Proceedings of the International Conference on Ground Improvement Techniques, May, Macau, pp. 71-80
4. Bo, M.W., Arulrajah, A. and Choa V. (1997b) Performance Verification of Soil Improvement Work with Vertical Drains, In: Proceedings of the 30th Anniversary Symposium of the Southeast Asian Geotechnical Society, Bangkok, Thailand, pp. 191-203.