Rifa'i, A.Vulliet, L.Laloui, L.2006-11-092006-11-092006-11-09200210.1201/9781003078807-46https://infoscience.epfl.ch/handle/20.500.14299/235616Simplified constitutive modelling of the behaviour of unsaturated soiltext::conference output::conference proceedings::conference paper