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2. Esveld C. (2001) Modern Railway Track MRT-Productions Netherlands.
3. Indraratna B. Khabbaz H. Salim W. Lackenby J. and Christie D. (2004). "Ballast characteristics and the effects of geosynthetics on rail track deformation." Proc. Int. Conf. on Geosynthetics and Geoenvironmental Engineering ICGGE 2004 Bombay India: 3-12.
4. Deformation and Degradation Mechanics of Recycled Ballast Stabilised with Geosynthetics