1. Allen, W.A., 1991. Subsurface drainage of pavement structures — Current Corps of Engineers and industry practice. USA Cold Regions Research and Engineering Laboratory, CRREL Report 91-22.
2. Angen, E., 1978. Moisture transfer in soils. Institute for Road and Railway Construction, Norwegian Institute of Technology, Report no. 18, Trondheim, February.
3. Berg, L., Bigl, S.R., Stark, J.A., Durell, G.D., 1996. Resilient modulus testing of materials from Mn/ROAD, Phase 1. USA Cold Regions Research and Engineering Laboratory, CRREL Report 96-19.
4. Bergan, A.T., Fredlund, D.G., 1972. Characterization of freeze–thaw effects on subgrade soils. Proc. Symp. on frost Action in Soil, Organization for economic Cooperation and Development, Oslo, Norway.
5. Bergan, A.T., Fredlund, D.G., 1973. Characterization of freeze–thaw effects on subgrade soils. In: Proceedings of the Symposium on Frost Action on Roads, 1–3 October, Oslo, Norway, Vol. 2. Organization for Economic Cooperation and Development, Paris, pp. 119–143.