P.V. Long, D.T. Bergado, L.V. Nguyen, and A.S. Balasubramaniam. 2013. “Design and Performance of Soft Ground Improvement Using PVD with and without Vacuum Consolidation”. Geotechnical Engineering Journal of the SEAGS & AGSSEA 44 (4). Bangkok, Thailand:36-51. https://doi.org/10.14456/seagj.2013.5.