1. AGS (2005a) Position Paper—Registration. Association of Geotechnical and Geoenvironmental Specialists, Beckenham. World Wide Web Address: http://www.ags.org.uk/aboutus/RegistrationGeotechnicalEngineers.pdf .
2. AGS (2005b) Electronic transfer of geotechnical and geoenvironmental data using XML data format. Progress Report. Association of Geotechnical and Geoenvironmental Specialists, Beckenham. World Wide Web Address: http://www.ags.org.uk/agsml/AGSMLAugust2005Report.pdf .
3. AGS (2006) A Client's Guide to Desk Studies. Association of Geotechnical and Geoenvironmental Specialists, Beckenham. World Wide Web Address: http://www.ags.org.uk/publications/Deskstudies.pdf .
4. On the government waterworks in Trafalgar Square;Amos;Proceedings of the Institution of Civil Engineers,1860
5. Rain-induced slope instability in Hong Kong