1. Altberg, W. J. (1936) Proc. Int. Union Geod. Geophys. Int. Assoc. Sci. Hydrol., pp. 373–407.
2. Ashton, G. D. (1972) Int. Assoc. Hydraul. Res., Symp. Ice Its Action Hydraul. Struct., 1972 pp. 123–129.
3. Froude Criterion for Ice-Block Stability
4. Ashton, G. D. (1974b) Int. Assoc. Hydraul. Res., Symp. River Ice, 1972 pp. 83–89.
5. River Ice