1. Brown, S. F. ''Achievements and challenges in asphalt pavement engineering'', In Proc. of 8th Int. Conf. on Asphalt Pavements, Seattle, 1997.
2. Dawson, A., Correia, A. G. ''The effects of subgrade clay condition on the structural behaviour of road pavements'', in Flexible pavements, Correia G., Editor, CRC Press: Balkema, pp. 113-119, 1996.
3. Dawson, A. ''Water in road structures: movement, drainage & effects. Vol. 5. Springer Science & Business Media 2008.
4. Track geotechnology and substructure management;Selig,1994
5. Chu, X. ''A Review on the Resilient Response of Unsaturated Subgrade Soils'', Advances in Civil Engineering, Article ID 7367484, 2020, pp. 11, 2020.