1. Ashley, R. and Hopkinson, P. Sewer systems and performance indicators-into the 21st century. paper presented at Chartered Institution of Water and Environmental Management/International Association of Hydrological Research conference on Performance Indicators in the Water Industry. December6.
2. Ashley, R., Smith, H., Jowitt, P., Butler, D., Blackwood, D., Davies, J., Gilmour, D. and Foxon, T. Making more sustainable decisions for asset investment in the water industry-Sustainable Water Industry Asset Resource Decisions-the SWARD project. paper presented at First National Conference on Sustainable Drainage. June, Coventry.
3. Balkema, A. Sustainable criteria for the comparison of wastewater treatment technologies. Proceedings of 11th European Junior Scientist Meeting on "The Myth of Cycles versus Sustainable Water and Material Flux Management'. February12-15, Wildpark Eekholt, Germany.
4. Balkema, A., Weijers, S.R. and Lambert, F.J.D. On methodologies for comparison of wastewater treatment systems with respect to Sustainability. Proceedings of WIMEK Congress on Options for Closed Water Systems. March11-13, Wageningen, the Netherlands.