1. Structural Foundations Manual for Low-Rise Buildings
2. BRE (1989) Simple Measuring and Monitoring of Movement in Low-Rise Buildings. Part 1: Cracks. BRE Digest 343. BRE Press, Watford, UK.
3. BRE and Longworth, I (1989) Simple Measuring and Monitoring of Movement in Low-Rise Buildings. Part 2: Settlement, Heave and Out of Plumb. BRE Digest 344. BRE Press, Watford, UK.
4. BSI (British Standards Institution) (1990) BS 1377-2:1990: Methods of test for soils for civil engineering purposes – Classification tests. BSI, London, UK.