1. Alonso, E.E., Gens, A., Josa, A.: A constitutive model for partially saturated soils. Géotechnique 40(3), 405–430 (1990)
2. Alonso, E.E., Lloret, A., Gens, A., Yang, D.Q.: Experimental behaviour of highly expansive double-structure clay. In: Proc. 1st Int. Conf. Unsaturated Soil, vol. 1, pp. 11–16. Balkema, Paris (1995)
3. ASTM D 698-91e1. Standard Test Method for Laboratory Compaction Characteristic of Soil Using Standard Effort, ASTM, Annual Book of ASTM standard, Section 4: Construction, vol. 04.08: Soil and rock (I): D420-D4914., Am. Soc. Testing and Materials, Philadelphia (1998)
4. Aversa, S., Nicotera, M.V.: A Triaxial and Oedometer Apparatus for Testing Unsaturated Soils. Geotech. Testing J. 25(1), 3–15 (2002)
5. Aversa, S., Vinale, F.: Improvements to a Stress-Path Triaxial Cell. Geotech. Testing J. 18(1), 116–120 (1995)