1. A methodology to predict the elastic and inelastic behavior of railroad ballast;Alva-Hurtado,1980
2. Annual Book of Standards, Volume 04.08, Soil and Rock (II): D5714 – Latest;ASTM,2008
3. Manual for Railway Engineering;AREMA,2015
4. Cyclic loading of railway ballast under triaxial conditions and in a railway test facility;Aursudkij;Granular Matter,2009
5. J. Billam, Some aspects of the behaviour of granular materials at high pressures, in: Paper Presented at The Proceeding of the Roscoe Memorial Symposium, Cambridge, 1971.