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A. Khosravi and  S. Ghadirian and  J. S. McCartney,  Effect of Subsequent Drying and Wetting on the Small Strain Shear Modulus of Unsaturated Soils.   journal   = {International Journal of Environmental, Chemical, Ecological, Geological and Geophysical Engineering}, [online]. World Academy of Science, Engineering and Technology. February 2016, vol. 110(2). 202 - 207[viewed 20 January 2018]. Available from: http://waset.org/publications/10003733.