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2. Barry, M. E. & Coombes, P. J. 2007, “Optimisation of mains trickle topup volumes and rates supplying rainwater tanks in the Australian urban setting”,Proceedings of the Rainwater and Urban Design Conference, Sydney.
3. Coombes, P. J. 2002, “Rainwater tanks revisited: new opportunities of water cycle management”, PhD Thesis, University of Newcastle.
4. Coombes, P. J. 2005, “Integrated Water Cycle Management: Analysis of resource security”,Water, March, Australian Water Association, Sydney.
5. Coombes, P. J. & Kuczera, G. 2001, “Rainwater tank design for water supply and stormwater management”, Stormwater Industry Association 2001 Regional Conference, Port Stephens. NSW.