1. Truesdell, C., Noll, W.: The Non-Linear Field Theories of Mechanics. Springer, Berlin (1965)
2. Gudehus, G.: A comparison of some constitutive laws for soils under radially symmetric loading and unloading. In: Proceedings of 3rd International Conference on Numerical Methods in Geomechanics, pp. 1309–1323. Aachen (1979)
3. Gudehus, G., Mašín, D.: Graphical representation of constitutive equations. Géotechnique 59(2), 147–151 (2009)
4. Darve, F.: The expression of rheological laws in incremental form and the main classes of constitutive equations. In: Darve, F. (ed.) Geomaterials: Constitutive Equations and Modelling, pp. 123–148. Elsevier (1990)
5. Tamagnini, C., Viggiani, G.: Constitutive modelling for rate-independent soils: a review. Revue Française de Génie Civil 6(6), 933–974 (2002)