1. AASHTO (2002). AASHTO Guide for design of new and rehabilitated pavement structures, AASHTO, Washington, D.C., USA
2. Bing, L., Mustaque, H., and Andrew, J. G. (1997). “Seasonal variation of backcalculated subgrade moduli.” Transportation Research Record No. 1557, 1997 Annual Meeting, Washington, D.C., pp. 70–80.
3. Guymon, L. G., Berg, R. L., and Hromadka, T. V. (1993). Mathematical model of frost heave and thaw settlement in pavements, CRREL Report, Vol. 93, No. 2.
4. Jo, K. T., Jin, J. H., and Nam, Y. K. (2002). “Anti-frost layer of road pavement for effectiveness verification by site measure and laboratory testes.” Journal of the Korean Society of Civil Engineers, KSCE, Vol. 22, No. 5-D, pp. 913–921 (in Korean).
5. Kim, D. S., Kweon, G. C., and Lee, K. H. (1997). “Alternative method of determining resilient modulus of compacted subgrade soils using free-free resonant column test.” Transportation Research Board 1557, pp. 62–69.