1. Association of British Insurers Webpage;ABI,2009
2. Low-Rise Buildings on Shrinkable Clay Soils: Part 2. BRE Digest 241;Anon.,1980
3. Prevention of Foundation Failures in New Dwellings;Anon.,1988
4. Low-Rise Buildings on Shrinkable Clay Soils: Part 1. BRE Digest 240;Anon.,1993
5. Underpinning. Digest 352;Anon.,1993