1. Barton, M. E. 1974. Soft sandstones: geotechnical properties and sensitivity to moisture changes. Proc. 2nd Int. Cong. Int. Assoc. Engng. Geol, Sao Paulo, Vol. 1, Theme IV, Paper 7, 6 pp.
2. Bowman, C. 1967. Discussion. Proc. 7th Wld Petroleum Cong. Mexico City, Vol. 3, Tar Sands Section, 561–680.
3. Broms, B., Schwab, E. F. & Jernelius, I. 1976. Behaviour of a dilatant volcanic sand during excavation under water. Proc. 5th Conf. Soil Mech. & Found. Engng. Budapest, 13–29.
4. Brooker, E. W. 1975. Tarsand mechanics and slope evaluation. Proc. IOH. Can. Rock Mech. Symp. Queen's Univ. Kingston, Ontario, Vol. 1, 409–446.
5. Carrigy, M. A. 1967. The physical and chemical nature of a typical tar sand: bulk properties and behaviour. Proc. 7th Wld Petroleum Cong. Mexico City, Vol. 3, Tar Sands Section, 573–581.