@conference {SIEEUM5286,
	title = {Validation of an elastoplastic model to predict secant shear modulus of natural soils by experimental results},
	journal = {Proceedings of the 3rd International Symposium on Deformation Characteristics of Geomaterials: Deformation Characteristics of Geomaterials},
	year = {2003},
	month = {2003-01-01 00:00:00},
	pages = {1057{\textendash}1061},
	publisher = {Swets \& Zeitlinger},
	address = {Lyon France},
	keywords = {Elastoplastic constitutive law, Shear hardening, Soil stiffness},
	url = {http://sieeum.eng.uminho.pt/publicacoes/pub.aspx?pubid=5286},
	author = {dos Santos, J. A. and Correia, A. G. and Modaressi, A. and Lopez-Caballero, F. and Gomes, C. R.}
}