T. Shibata, S. Nishimura, M. Fujii, and A. Murakami. “Evaluation of Strength of Soft Ground Improved by Vacuum Consolidation”. Geotechnical Engineering Journal of the SEAGS & AGSSEA, vol. 46, no. 1, Mar. 2015, pp. 95-102, doi:10.14456/seagj.2015.59.