P.V. Long, D.T. Bergado, L.V. Nguyen, and A.S. Balasubramaniam. “Design and Performance of Soft Ground Improvement Using PVD with and without Vacuum Consolidation”. Geotechnical Engineering Journal of the SEAGS & AGSSEA 44, no. 4 (December 31, 2013): 36–51. accessed May 12, 2025. https://ph01.tci-thaijo.org/index.php/SEAGS_AGSSEA_Journal/article/view/259412.