1. Allison, D. M. & Savage, R. P. 1976. Tests of Low-density Marine Limestone for use in Breakwaters. U.S. Army Corps of Engineers, Coastal Engineering Research Centre, Tech. Paper No. 76-4.
2. Allsop, N. W. H., Bradbury, A. P., Poole, A. B., Dins, T. E. & Hughes, D. W. 1985. Rock Durability in the Marine Environment. Hydraulic Research Ltd, Report No. SRll.
3. Allsop, N. W. H. & Latham, J-P. 1987. Rock armouring to unconventional breakwaters; the design implications for rock durability. In: Seminar on Unconventional Rubble-Mound reakwaters, NERC, Ottawa, Canada, Paper No. 2.
4. ASTM 1964. Resistances to Abrasion of Small-size Coarse Aggregate by Use of the Los Angeles Machine. American Society of Testing Materials, Designation C131.
5. ASTM 1965. Resistances to Abrasion of Large-size Coarse ggregate by use of the Los Angeles Machine. American Society of Testing Materials, Designation C535.