William, E and Airey, DW. A Review of the Engineering Properties of the Wianamatta Group Shales [online]. In: Vitharana, Nihal Dhamsiri (Editor); Colman, Randal (Editor). Proceedings 8th Australia New Zealand Conference on Geomechanics: Consolidating Knowledge. Barton, ACT: Australian Geomechanics Society, 1999: 641-647. Availability: <https://search.informit.com.au/documentSummary;dn=736896154066797;res=IELENG> ISBN1864450029.