J.-C. Chai, J. P. Carter, A. Saito, and T. Hino. “Behaviour of Clay Subjecting to Vacuum and Surcharge Loading in an Oedometer”. Geotechnical Engineering Journal of the SEAGS & AGSSEA, vol. 44, no. 4, Dec. 2013, pp. 1-8, doi:10.14456/seagj.2013.1.